she says the hospital gave the impression she was simply signing up to get "support" in caring for a preemie. your thought was, when you signed the papers, that what was going to happen? sharrissa: that my son would be given the best care possible and that even with his prematurity being as extreme as it was, that it would be okay because i had all of this help. sharyl: she had no clue, she says, that the "support" study was actually a national experiment on the most fragile of test subjects -- 1300 extremely premature infants. bernita lewis also agreed to enroll her baby, christian, in the "support" study at the same hospital. bernita: christian was born at 27 weeks. sharyl: how much did he weigh? bernita: he was 1 lb, 9 oz. he was very tiny. sharyl: she says a hospital worker told her the study was just to collect data. bernita: she asked would i be interested in christian being in a study. they wanted to use his medical records to help babies in the future. and i told them absolutely, they could use any records they wanted to use. was a possible risk of death? bernita: no, there were no risks discussed. sharyl: "support" stands for "surfactant positive airway pressure and pulse oximetry randomized trial." funded with $20.8 million tax dollars, it was a collaboration among the national institutes of health and two dozen research bodies, including duke and yale universities and medical schools. researchers had good intentions. they already knew that without enough oxygen, preemies could get brain damaged or die. but too much oxygen, they could go blind. the "support" study was searching for the sweet spot. dr. john lantos: the question is -- what level of oxygen would be optimum in order to save as many babies as possible without having the survivors become sharyl: to find out, the infants were randomly assigned, as with the flip of a coin, to either a low oxygen group or a high oxygen group. the study reached a tragic and conclusion -- the babies in the likely to go blind. those unlucky enough to have been put in the low oxygen group were more likely to die. when the findings became known, similar research around the world was halted midstream. bioethicist dr. john lantos defended the "support" study as an expert witness against families who unsuccessfully sued for damages, including bernita and sharrissa. dr. lantos: this was a study that was well-designed, conducted to the highest ethical standards, with a completely adequate consent that was conducted without harming any babies and led to an important finding that's gonna save lots of lives. sharyl: on nearly every point, dr. michael carome disagrees. he's an internationally recognized expert on research ethics at the watchdog group public citizen. what's wrong with what they did in the study, in your view? dr. carome: the parents of these babies weren't told the exact purpose of the research, the nature of the research, in terms the risks of the research. sharyl: adding to the controversy, researchers didn't tell parents a remarkable fact -- they had altered the infants' oxygen monitors to give false readings so the hospital wouldn't adjust them outside of their assigned low or high oxygen range. babies in the study were put on oxygen monitors that were rigged to give untrue or false readings? dr. carome: that is correct. sharyl: in terms of things that have happened in the past, how bad is this? dr. carome: i think this is extremely serious and about as bad as it gets. dr. lantos: it seems to me that there's a lot of second guessing, arm chair quarterbacking, and playing gotcha here. sharyl: the debate would be purely academic if it weren't for an extraordinary turn of events -- after questions were raised, the government agency that polices study ethics sided with critics and issued a searing indictment of the government-led study. for human research protections told researchers they violated federal regulations for informed consent for their failure to describe the reasonably foreseeable risks of blindness, neurological damage, and death. dr. carome was once a senior leader at the office for human research protections. the ethics office was in essence saying these consent forms were unethical? dr. carome: absolutely. sharyl: the concept of "informed consent" arose from an american tragedy -- the u.s. government's syphilis experiment on black men in tuskegee, alabama in 1932. for 40 years, the men were neither told they were in a study nor treated for their syphilis. an outcry in 1972 led to new rules. researchers are now required to disclose risks to test subjects and get their voluntary informed consent. and studies like "support" must be approved by ethics experts where the research is conducted. these were prestigious institutions and the federal government. how does something like this dr. carome: that is a great concern of ours. we looked at the consent forms from 22 institutions and they all failed in their duty to protect human subjects in this study. dr. lantos: most of the criticism is not coming from parents, but from regulars who, in my opinion, don't really understand the circumstances of oxygen therapy. sharyl: when the "support" parents learned about the true risks, the surviving study children were six years old. what thoughts did you have? sharrissa: it was really emotional. a lot of crying, a lot of disbelief, a lot of heartache, and then it was anger. i'm his mom, you know, i'm supposed to protect him, but it was almost like i threw him out bernita: i was angry. and i couldn't believe that some people who vowed, who took oaths to protect people would actually do this. that was mind-boggling. sharyl: if you had been told the risks involved and what they were really going to do, would you have signed him up? bernita: absolutely not. no. sharyl: yet there were no apologies. instead, the "support" researchers made a bold, new claim that's particularly controversial -- they said the babies were actually better off for having been in the study. dr. lantos: the risks of not being in that study were comparable to the risks of being in that study and perhaps even higher. sharyl: dr. carome argues that's simply wrong. dr. carome: there's no doubt that some babies, because they were in the study, died as a result. sharyl: amid the criticism, the "support" researchers and national institutes of health dug in. they launched a public campaign of opinion letters and meetings to attack the office for human enforcement action. >> the sensational claims of calling people unethical further detract from the serious discussion that needs to occur. dr. carome: the research community, many in the bioethics community and nih, have rallied together to defend this unethical research, and so that's part of the problem. sharyl: today, dreshan and christian are both nine and doing well considering their challenges. but they have many lingering health struggles, from respiratory problems to brain disorders. their moms are left asking if the "support" study factors in. bernita: we don't know if it would have happened anyway, or if it was caused by this. and it's just a game of just sharissa: he was born premature, at 25 weeks. so, we could expect some things, but to know that some others know, that makes me angry. and so, to the doctors or to the researchers, best thing i can say is shame on you. sharyl: more than 80 years after the tuskegee experiments, the "support" study has reopened painful wounds and is raising questions as to whether the protections for human test subjects are fundamentally flawed. those who've conducted this study and the federal government at large have basically said they don't think they did anything wrong? sharrissa: i don't see how anyone can say nothing was wrong with playing russian roulette with babies. babies who had no say so, no choice, no anything, just trying to survive. sharyl: numerous "support" researchers, the national institutes of health or nih, and the university of birmingham at alabama declined our interview requests. after the study revealed more deaths among babies on low oxygen, the american academy of pediatrics issued new to survive. recommendations to keep preemies on the upper end of the oxygen curve. in other words, doctors should not do what the "support" researchers did to half of the babies. the price of the presidency. this election year will be the most expensive in history. we'll tell you where the money. sharyl: political march madness is about to begin. tuesday, voters in more than a dozen states will caucus or cast primary ballots in the 2016 so many delegates are at stake that it is known as super tuesday. super tuesday has a super price tag as well. millions of dollars will be spent to attract voters. scott thuman "followed the money" to find out where all that cash is coming from. >> washington is broken. >> i'm fighting for you. >> no excuses, no surrender. scott: from the television ads to campaign events across the country -- >> god bless the great state of nevada. scott: running for president is expensive -- even for a billionaire. mr. trump: i'm funding my own campaign. i'm putting in a fortune and spending a lot of money. scott: and a lot of so-called "outside" money is being pumped into this campaign cycle. that's money spent by organizations other than the campaigns of the candidates. according to the federal election commission, the 2016 presidential candidates and the outside political groups supporting them combined have raised nearly $1 billion so far. with nearly half of that money -- 45% -- coming from so-called super pacs, outside groups that can support candidates but are not allowed to coordinate with and there's no legal limit to the amount of cash super pacs can raise or spend. so, where is all that money coming from? on the democrats' side -- hillary clinton has raised $184.1 million according to the center for responsive politics. $57 million of that is outside money with $50 million alone from priorities usa, the super pac that helped get president obama re-elected in 2012. its top individual donor for this election, at $6 million -- $7 million, is billionaire philanthropist and political activist george soros. bernie sanders has raised $95.4 million -- nearly all from direct campaign contributions. sanders has negligible super pac backing. his biggest chunk of outside support is $1.7 million from the union national nurses united. sen. sanders: american democracy is not supposed to be about billionaires buying elections. -- donald trump has $27 million fueling his presidential bid with 70% of that money coming from the candidate himself. trump's biggest outside money, $1.8 million, comes from the super pac, make america great again. ted cruz has $101 million backing his campaign with nearly $50 million coming from outside groups, including four super pacs that share the same name keep the promise. their biggest donor is listed in "open secrets" as the billionaire wilks brothers, at $15 million, who made a fortune in fracking. >> thank you very much. i appreciated. scott: marco rubio rounds out the top three gop contenders with $77 million in his war chest. $34 million of those dollars are from outside groups. the biggest chunk, $32.9 million, from conservative solutions pac -- its biggest donor is a luxury car dealer in south florida -- braman motorcars. but money alone can't guarantee a candidate will win the nomination. just ask jeb bush. outraised each of the top three republicans who are still in the race -- $152 million with some $118 million coming from the super pac right to rise. sharyl: and all that money gone. thanks, scott. scott: still ahead on "full measure" -- we read the political funny pages and talk with some of the happiest people in america -- the political cartoonists who see this election as a gift. and the president's push to close guantanamo. we'll talk to one influential sharyl: at president obama's last state of the union, he reaffirmed a commitment that was part of his first campaign -- to close guantanamo bay. this week, he announced how he would do it and why. pres. obama: for many years, it's been clear that the detention facility at guantanamo bay does not advance our national security - it undermines it. sharyl: the plan is a blueprint detainees, the last of nearly 800 who have either entered or exited since 2002. of the 91, 35 would be transferred to other countries. the rest, deemed to be too dangerous to release, would be moved to a facility, yet to be named, in the united states. the white house claims closing guantanamo would have an added bonus of saving between $65 million and $85 million a year. pres. obama: keeping this facility open is contrary to our values. it undermines our standing in the world. it is viewed as a stain on our broader record of upholding the highest standards of rule of law. sharyl: among those vying to be the next in the oval office -- sen. rubio: we are not going to close guantanamo. donald trump: we are going to loaded up with some bad dudes, believe me. sen. cruz: expand it and let's have some new terrorists there. senator sanders: i think we should shut down guantanamo. us. guantanamo hanging out there over our heads. sharyl: wednesday, attorney general loretta lynch testified before congress and confirmed highest standards of rule of law. that transferring detainees to the law. president obama has not been successful in closing gitmo during his seven years in office. recently, we spoke with senator lindsey graham, who sits on both the appropriations and armed services committees, who explained why it's not likely to close now. how can it be stopped? sen. graham: because congress won't let it. there's no way you're going to bring guantanamo detainees inside america without a plan approved by the congress. three years ago, i sat in the oval office with the president offered to help him close gitmo under one condition -- that the people who are brought into the united states be held under the held indefinitely without trial, no requirement in a war to let dangerous. we couldn't get there, so, at reason guantanamo bay is not closed is because president obama would not tell the left something they didn't want to hear. sharyl: president obama has shown, though, that he doesn't need your approval, hasn't he? sen. graham: yes, he would. there would be no funds available to transport the prisoners from guantanamo bay into the u.s. we can't make policies, we're not commanders in chiefs, but we do control the purse strings. i don't see any scenario where the congress would agree to fund to transfer the prisoners and set up a new jail. . hardest of the hard. if you let them out, they'll go back to the fight of americans and our allies. they need to stay in jail. sharyl: logistically, could he not empty out the prison before he tells you he's done so? sen. graham: no. he'd have to have funds to move them. sharyl: but he's released prisoners before without telling you in advance. sen. graham: he's repatriated prisoners to third countries not inside the u.s. sharyl: can he do that with all of them? sen. graham: no, there's no way that he's going to be able -- 49 are deemed by his own dangerous to release. sharyl: do you think congress will take some kind of proactive action to tell him not to? sen. graham: i think there's going to be a bipartisan rejection to president obama's call to move people inside the united states given the conditions we face throughout the world. wherever you put these prisoners, they become a magnet for terrorist attacks. there is talk about moving them to charleston. i can tell you this, there's not a snowball's chance in hell that any of these detainees are coming to the brig in charleston, period. sharyl: that "brig" in charleston is in senator graham's district. the other two potential locations to ship guantanamo prisoners are in kansas and colorado. coming up on "full measure" -- something is seriously funny. we'll see some of the editorial cartoons inspired by this election -- and talk with one sharyl: this political season is playing out like a reality tv show. there are already clear winners in the campaign -- the political cartoonists. the political circus was on display at a gathering in washington. as campaigns are in full swing across the country. >> i think they are really clever and funny and i'm not offended. >> it is funny. >> it really delivers very serious messages. sharyl: the cartoonists were treated like rock stars. matt worker of "politico." >> this is the world series, march madness. it does not get any better for political cartoonists than during a presidential campaign. sharyl: worker let us look over his shoulder at the cartooning of the candidates. >> of this presidential campaign is unlike any i have ever experienced. this week alone, we had hillary barking like a dog. the pope in an airplane starting a twitter war with donald trump. i was expecting to see political cartoonists' heads exploding across the country. in photoshop on the computer, i put the title "where the wild things are." sharyl: one pen stroke and he punctures the image campaigns spend millions to craft. >> it is a cheap shot. i'm sorry. what to drink team. everything is focus grouped. bernie's big issue is reaching out to minorities. maybe he could take a few hints from beyonce. this one was really fun to draw. lots of detail. i think cartooning is still really about the drawing. usually, there is a day when i am standing around going, "come on, dry, so i can put you on the scanner." i had this idea about drawing a circular firing squad about the gop debates. with the candidates all shooting across from each other. with donald trump is in the middle, his head spinning around like a machine gun. when the pope popped up at the end of the week, i threw the pope in. i would like to thank that we can bring civilized levity to the conversation. people understand that it is in good humor. he has a remarkable face to draw. sharyl: worker says there is a new outrage industry and that the campaigns and their followers often don't have a sense of humor at all. >> once upon a time, you had to worry about the letters to the editor and people threatening to cancel subscriptions. now it is like that crazy thing flying monkeys. suddenly, there are the flying monkeys coming on twitter and facebook. people should be passionate about their politics, but i think it is really important, in a democracy, that we respect people's differences and treat each other with a certain amount of respect. ideally, a good joke or a witty retort can do that in a way that does not instigate a fight. sharyl: but if it does, he plans on having a ringside seat. >> this is going to remain a really crazy circus right into the conventions and then we have a whole new kind of circus. i'm hoping i get to go to the conventions and take my sketchbook. sharyl: but those conventions are still months away. measure" -- we tackle one of the biggest topics in america today -- the border. between arizona and mexico. where the question is, who is really calling the shots? we will go over some of the most that is next week on "full thank you for watching. i'm sharyl attkisson. until next time, we'll be searching for more stories that - this week on awesome adventures, we're in croatia. (techno instrumental music) it's time for awesome adventures. come with us as we travel the globe taking kids on incredible journeys. it's all here on awesome adventures. (upbeat instrumental music) welcome to awesome adventures. i'm nicole and this week we are in the incredible country of croatia. you know, italy and greece get a lot of attention in this part of the world, but right at their doorstep is this hidden gem. and guys, seriously, croatia has so much packed in, from the forest to the coast there is one breathtaking spot after another. the island type or just an adventurer, croatia's got you covered. (alarm sound) croatia is located along the adriatic sea in europe, right across from italy. we're going to base out adventures in between the capital city of zagreb and the coastal city of split. one of the many allures to croatia is simply mother nature. (light instrumental music) in a country that's a little smaller than west virginia, national parks and gorgeous coastlines invite you to experience natural beauty at its best. (light instrumental music) about two hours away from both zagreb and split are the plitvice lakes, one of the most amazing sites i've ever seen. over 1,200 waterfalls rain down at seemingly every step of the way. which then condense down to one river, creating an immaculate sight best described as magical. walking trails lead above, below and alongside these serene waterways. these lakes are amazing studies in science. they're constantly changing and evolving. plan on spending at least one full day here. this spot is truly one of a kind. (upbeat instrumental music) a few hours away from this national park, you'll find the coastal city of split. this city is home to the massive diocletian's palace. a roman structure originally built between the third and fourth century. today the scene is a bit more modern but remnants of the palace still exist. beyond the national parks and beautiful coastlines, croatia also has a plethora of islands scattered in the adriatic sea. and split is your jumping off point to get to many of those spots. our first stop is a little remote, now, i took a boat to get here to the beautiful island of vis. now i'm gonna take another boat that will take us to another island and then finally one last boat that will take us to out first activity. it's a lot of boats but like i said, it's remote. it took me two hours by boat to get to the island of vis. vis feels like a movie set with two perfectly constructed fishing towns on opposite sides of the island and inviting, clear water off pebble beaches. from vis, i hopped on one boat, then the next. i came all this way to see bishevo, or what's commonly known as the blue cave. the cave itself has a small entry in water, wow, that can get a little rough. what! it looks fake. wow! i actually didn't expect the water to be this illuminated. it is bright. underneath the water. i honestly don't think i've ever seen water this clear. this is unbelievable. so we are now in the blue cave as you can clearly see. this cave was discovered in 1884 and has become a world attraction because of its blue color. the water is so fluorescent because the sun actually reflects off of the sand at the bottom of this cave and turns it into this turquoise blue color. i really didn't expect it to be this bright. this is fascinating. this is spectacular but there is still so much more fun to come. up next, i'm gonna head up the coast to meet up with our local teens. coming up, we dive into falconry, rock climbing and enjoy a sunset by the sea. (upbeat instrumental music) welcome back to awesome adventures from croatia. i was exploring by myself before but now i'm gonna meet up with our local teens and a few soaring friends. (upbeat instrumental music) meeting me at our next adventure are local croatian teens, andrea and bruno. - croatia is the one, small country in europe. it is the most beautiful country in the world. - i'm so excited that i'm going to be here today with nicole and do falconry and rock climbing. (upbeat rock instrumental music) - [nicole] the three of us met emilio who overseas how are you? hi. this is a hospital for between 150 to 200 sick and injured birds per year. it also puts on flying demonstrations to teach visitors about these beautiful animals. - they are trained birds and they are born in captivity. so, you're not allowed to use wild birds for any kind of public demonstrations. - are you frightened of birds at all? - no. - you will see now. - um, we'll see (laughs). - he's like, actually you should be scared (laughs). - no, not fear but be careful. - yeah, so let's get into that. - okay. - what are some of the rules? - rules are you must respect personal space. - okay. - you know what that means. - yeah, i think so. - if you see the warning signs, that's the edge of the area. - what are the warning signs? oh, okay. - okay. - we don't want to see that. - they're not animal who won't fight for what (mumbles), okay i defend my territory, don't come closer. - yeah, definitely. - i'm not scared (laughs). - oh, then you can go first. so just be cool. - first, hand is along the body. it's signal for bird, follow me. if you want to call the bird, you lift the hand and this is a good position. you'll never feel this. you will feel this, very smooth, elegant landing and you'll feel just the weight. okay, good. ready? - yeah, i am. - but we'll make one jump just to be (mumbling). okay. come closer because the bird knows who you are. hold up your hand. the bird is watching, there she is. - you're next. with andrea, our bird started with a simple jump but emilio has a new falcon for bruno that will take flight. - when a bird is free, she's not flying somewhere else and i wait for her here, she is following you. if you're standing still, bird will be over there. if you're moving left, bird will be following left, if you're going right, this bird will go right. - okay. - good. (upbeat rock instrument music) - are you ready? - [bruno] well, i don't know, maybe. don't lose the grip, hold the foot tight. (whistles) and that's it. - so, now, she will fly off when she eats. - yes. - okay. - okay. - [nicole] okay, bye, bye birdy. - [bruno] bye, bye. - ahh, i got a nice, fresh, (gasps) glove! - she is a little anxious because she knows if someone takes a glove it will be for food, whole food. - yeah, just come here (laughs) and bird is on the fist. - hello croatia! having these birds land on your arm is pretty surreal. in addition to falcons, there's another bird on site we were curious to see. - [andrea] she's a big girl. - wow. - okay, let's take a look at mordecai. - hi mordecai. - it's a european eagle owl. the biggest owls in the world are european eagle owls. - she's actually really cute. - you want to touch it? - yeah, i want to touch it. - don't do that. (laughter) she's know me for (mumbling) years. look it and she will try to grab me. (gasps) my hand a (mumbling), my head. - aww. can i rub my head against him? - exactly, yes you can. - can i hold her? - glove. i will give you an idea what it means when she catch the animal. the bird is on your fist. she's quite heavy. okay, i will make a noise and she will grab your hand. (bird call) (gasp) - oh my gosh, that's tight. - you see that? - yeah. - so. - wow, she's getting tighter. - yeah, come on darling. its look, they are dangerous but they never attack people. - don't be scared (laughs). like the falcons, we took turns holding this magnificent bird. - why is she watching me? - cause you're a new player in the game. she wants to know who you are. - [nicole] and each of us got a sense of the raw power (bird call) of the european eagle owl. (bird call) even more. one more, the sound it will be impossible for you to move the hand. i will stop it now. - okay, thanks. - well, i definitely learned a lot about birds today. - yeah, me too. - yeah, well thank you for educating not only us, but everyone so that we can still enjoy these beautiful birds. - yes. - yeah. - coming up, it's off the one of the more popular rock climbing spots in all of europe. (yelling) - [voiceover] promotional considerations paid for by the following. our next item is a genuine "name your price" tool. this highly sought-after device from progressive can be yours for... twenty grand? -no! we are giving it away for just 3 easy payments of $4.99 plus tax! the lines are blowing up! we've got deborah from poughkeepsie. flo: yeah, no, it's flo. you guys realize anyone can use the "name your price" tool for free on progressive.com, right? [ laughing nervously ] [ pickles whines ] what? (upbeat instrumental music) - welcome back to awesome adventures. as our croatian travels continue with andrea and bruno. natural rock formations spread throughout this country, creating perfect spots to clip in some lines and put our muscles to the test. (upbeat instrumental music) we're about to go rock climbing but let's get some rest in and i'd love to sit down with you guys and get to know you a little bit better. your country is beautiful, there's clearly so much to do here. what are some of your favorite things to do in croatia? - croatia is very popular because of its sports. because as you can see we have a lot of great sailing and rowers and water sports are pretty popular. - it's a small country but you have it all, like from the snow to the sea, you can do everything, almost every sport here. croatians are active (laughs). - yeah, well we're about to get active right now. we're about to climb that wall of rock behind us. - woohoo (laughs). - okay, let's go. - [nicole] we're in paklenica national park, which is world renowned for the rock climbing community, especially here in croatia. andre from paklenica avanturist, has a top rope set up for us, meaning a line that has been secured at the top that will be controlled from the ground. ensuring that if we slip, our safety rope will catch us. i'm used to rock climbing on a wall with grips. - yeah, this is similar to wall. you will see. - okay. - it's pretty easy to climb. - how long it will take us to go up there? - if you are fast enough about half a minute. (laughter) - so, it's like half and hour for us. - right, we're gonna take our sweet time. (upbeat drum instrumental music) you're going first! - yay! - andrea's up first! - why am i always first? - i only said that because i don't want to go first. (upbeat drum instrumental music) - oh man. are there any markers or something? - no. - no, just my brain and me? - [andre] yeah. - okay, i have no idea. what can i do? (upbeat drum instrumental music) - you're doing quite well andrea. - yeah? - [nicole] just monkey it up there. she's not really making any mistakes. - [bruno] she seems to be pretty cool. - what do you think? - she's doing pretty good. - don't use the rope! i'm learning fast. - yup. - [andrea] just a little bit more. (yells) (grunts) (deep breathing) i'm so tired. - [nicole] that it? (cheers) now repel down. she's repelling down. this is the part where you've really just got to put all your weight in your backside. - [andrea] oh my god, it's so high. (yells) (laughs) - [nicole] it's okay though. (cheers) - man. - alright, so what are some pointers? - so, the pointer is don't think about it. you're gonna be fine. no actually it's pretty cool if you don't look down (laughs). - neat, alright, i'm gonna put on my shoes, my really uncomfortable shoes. - yeah, really uncomfortable i can tell you that. (upbeat instrumental music) - alright, i'm up next. what is the chalk for, my hands? - when your hands start sweating then you use the chalk. - they're already sweaty. - then you can put it immediately. (upbeat instrumental music) - she's doing really good actually. she's fast. - [andre] just use your legs. walk through the crack. - go, go, go, go. - the view from the top is great. yeah, it was high. - [andrea and bruno] nicole, nicole, nicole, nicole! (cheers) - andrea did a good job. she told me not to think about it and i didn't. it was a lot of fun. i actually would love to try a harder climb. it's so beautiful here. but as you can tell i'm a little bit out of breath. (cheers) (cheers) let's go back up again. - okay, go. - i'm ready to climb that guy, with no rope and just my muscles. just kidding. that was awesome though. - [andre] ready? - [bruno] born ready. (techno instrumental music) - [nicole] so would you come back here to climb again? - [andrea] yeah, sure. (cheers) - [andrea] good job! (cheers) - [nicole] now let's see him rappel. (cheers) this is the most dangerous part. (yells) (cheers) good job, what did you think? - it was awesome. - yeah, i had a good time. - me too. - i gotta say though, i think i was the fastest. - i was the fastest. - okay, i was the best rappel. - then there was me, perfect. (cheers) (talking simultaneously) - okay, but seriously guys, how much fun was that? (mumbling) yeah, would you come back here? - yeah, absolutely. - yeah, i want to stay in croatia so that i can rock climb with you everyday. - yeah, us too. - yeah? - we are her so. - ah, what a good time. - yeah. - and so we're not going to get to see you at tomorrows activity. - yeah. - i know, sad but, yeah, you'll be with me. so, yeah, awesome time, it was so nice meeting you. ah, if i ever come back to croatia, we'll all go rock climbing and i'll beat you guys again. - no. (laughter) - [nicole] although my adventures with andrea and bruno wrapped up for today. there's still one more spot i want to check out on my own before the sun goes down. after a long day on the mountain, we've come to the town of zadar to hear the relaxing music of this sea organ right at sunset. so how this works is there's seven sections of five pipes that are built underneath these stairs. when the waves come in these pipes act as whistles, producing this beautiful music. as you can see here below me, the music all comes out through these speaker systems if you will. this is stunning and exactly how i want to end an afternoon in croatia. (upbeat instrumental music) up next, our trip to beautiful croatia winds down. (upbeat instrumental music) welcome back to awesome adventures in croatia. we started out along the water in split and have slowly made our way back to the capital city of zagreb. so as you can imagine, there's a lot of history here. while it's the most populated spot in the country, when you're out and about it doesn't feel that way. it's definitely a different vibe from the seaside city of split. and that contrast made zagreb a good ending point on our trip. all of our adventures have been thrilling so far. so what do you say we try something a little more traditional. let's learn a few croatian tunes. bruno had to leave us in split but a trio of local musicians awaited us inside, ready to teach andrea and i about tamburitza. tamburitza refers to the family of instruments that when played together make up traditional croatian folk music. they're all string instruments. for example, one similar to a guitar, another to a ukulele or mandolin. for centuries, this music was passed down from generation to generation and much like other regions of the world, croatia has developed its own style of folk music. (cheers) that was beautiful! hello, hello, i'm nicole. - i'm zoyo. - hi, nice to meet you. - hi mr. zoyo. - i'm zoyo. - i see some instruments here that i am not familiar with. what's the name of these instruments? - bisernica an croatian. (instrumental music) - wow, so i'll be playing like that in five minutes, right. - yeah, okay. (laughter) - [nicole] so anyone with a musical background could in theory pick things up fairly quickly. our problem, andrea and i don't have that musical background. we won't be the lead instruments but what we can do is learn a couple easy chords and play backup to zoyo. - (mumbling) da da da da da da da da da da da da da. okay, huh, huh. - now, let's talk about croatian music. from heart (mumbling). and when you put tamburitza music, if you play from heart it's real. everything, kind of like every music in the world the same. - [nicole] he makes it sound so easy. andrea and i just want to hit a couple notes in tune. - (mumbling) jedan, dva, tri, ho! (croatian folk music) - that was from the heart. that was beautiful. well, i think we should just take the instruments so that we can practice. - yeah, sure, i'll take the big one. - i'm gonna take it back to america with me to practice. and you can just carry that guy out. - nobody will notice. - we will see, bye. - [voiceover] promotional considerations (upbeat instrumental music) - ah, so my adventures here in croatia are coming to an end but andrea, we had such a good time. - i agree. - yeah, and bruno was here, we went rock climbing, the birds, what was your favorite part? - rock climbing. - yeah and we totally, we climbed faster than bruno. but you guys are so lucky to live in this country. it's picturesque, it's charming and there's so much to do and see here. - well, i love it too. - yeah, i love croatia. so that's it for this week on awesome adventures but we'll see you next time. >> eight seconds, you ride eight , you advance. want bragging rights? does for your career. your confidence, your legacy. >> moony's iron cowboy. >> and and there is $100,000 on the line. >> iron cowboy. >> every second is critical. every ride is survival. it's the pbr second major, more points, more money. it's a bull riding's best. of the time is now. >> the stars of the built ford tough series way almost 10 times more and hit it hundred times harder than the nfl's best. the pbr is bringing the boom. five years old old, keyshawn whitehorse and knew he wanted to be a pbr rider and in his first every that he fulfilled wondering, he is not finished.

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