good evening. diane is on assignment. and we begin here with that breaking news out of boston on tonight. you've see the mother of the alleged bombers talk about her sons. this evening, abc news has learned the cia had put her on a terrorist watch list a year and a half ago. russia apparently concerned that she was a religious militant. also tonight, investigators combing this landfill, searching for the laptop used by the surviving brother before the bombing. and that suspect, 19-year-old dzhokhar tsarnaev has been moved from the hospital to this federal prison, 40 miles from boston. all of this fast-moving, as we also israel for the first time from the carjacking victim, who describes what it was like to escape that car with those brothers. abc's linsey davis, who has been in boston from the start, with us and leading us off right here tonight. linsey, good evening. >> reporter: good evening, david. that's right. the big headline tonight that abc news has learned that the suspects' mother was herself on a terror watch list. this as we're starting to hear more from those who came face to face with the suspects. tonight, abc news has confirmed the suspects' mother, zubeidat tsarnaev, was added to a terror watch list along with her older son in 2011 at the cia's request, who received information from russia describing them as religious militants. it remains unclear what led them to that determination. >> sure that my kids were not involved in anything. >> reporter: and tonight, chilling new details from the one person trapped with them. the carjacking victim who helped to prevent more bloodshed. authorities say he might have prevented the alleged boston bombers from targeting new york times square next. a young man from china, just 26 years old, who asked to be called simply danny. >> the old brother reaches into the window, unlocks the door, gets in, points a silver handgun at danny. >> reporter: he described the 90 terrifying minutes to "the boston globe." did danny feel like he was going to die? >> he thought he was going to die. >> reporter: in that car, he listened as the two brothers talked to each other about girls, their iphones, music. the whole time fearing he would be next, danny was trying to figure out how he could escape. the car they chose to carjack low on gas. they pull into the gas station, the younger brother went in to pay. the older brother puts his gun down and begins working the gps in the car and that was the moment. "i did it very fast," danny said, "using my left hand and right hand simultaneously to open the door, unfasten my seat belt, jump out and go." the victim said he ran at an angle so when the brother grabbed his gun, it would be harder to shoot him. he hid in a closet in a gas station across the street and then called 911. meantime, tonight, another voice. >> the guy with the hat, the glasses, the aviators and the 5:00 shadow. >> reporter: jeff bauman, while in the hospital with both his legs blown off, described tamerlan's face. the only man who wasn't smiling beforehand. >> everyone was having a great time and just that one guy, you know, he didn't look like he was having a good time. you know how you size somebody up and i just looked at him, i was like, "what's this guy's problem?" >> stunning that he remembers his face. and linsey back with us now. i wanted to ask you somebody that pierre thomas and our investigative team reported in to us late today. there's indication at this point that the brothers might have had more help than just the internet in making these bombs? >> reporter: that's right. some investigators are saying that they believe that the older brother must have had outside training to help make these bombs but they just can't prove it yet. >> fast-moving again tonight. linsey davis in boston. linsey, thank you. and with so much attention with the terror in boston, late today, another unsettling image. a very stark reminder of september 11th. an incredible discovery. wedged between two buildings in new york city, a piece of one of the planes from 9/11, the landing gear, just blocks away from ground zero, almost 12 years later. abc's ron claiborne is in downtown manhattan tonight with the images. ron? >> reporter: david, a surveying team inspecting the narrow passageway between these two buildings, one of the buildings on the left, a mosque. made a discovery. the landing gear had the imprint from boeing. both of those aircraft that hit the world trade center on 9/11 were made by boeing. it was found around 11:00 this morning, the piece that was discovered wedged between the two buildings. the part bearing a boeing stamp and serial numbers. it was found not a quarter of a mile from where the north tower of the two skyscrapers once stood and where the freedom tower now nears completion. it will be finished in just three days. surveyors hired by the property owner to inspect the rear of the building found the debris and called 911. when the airliners flew into the upper floors of the world trade center towers, most of those aircraft were consumed in the explosion. but some parts have been recovered. today's startling discovery comes just days after more human remains were found at the site that has become known as ground zero. and david, police are now treating the scene here as a crime scene, meaning that no work, of course, will be taking place. authorities say they will be sifting that area where the landing gear was found for the possibility of finding human remains. a grim reminder of what happened nearly 12 years ago, just a few blocks away from here. david? >> wow. ron, incredible discovery today. our thanks to you. and from washington tonight, another developing story. the president now facing some tough choices on syria. 24 hours after intelligence revealed syria has used chemical weapons against its own people. tonight, the u.n. is demanding syria let experts examine the evidence. abc's chief white house correspondent jonathan karl at the white house tonight and jonathan, we noticed that the president used carefully chosen words on this today. >> reporter: sure did, david. but make no mistake. this was tough talk from the president. and it came as the white house reaffirmed that all options are on the table when it comes to syria, including military action. this video, from a syrian opposition group, purports to show the gruesome aftermath of a deadly sarin gas attack in march. part of the mounting evidence that the syrian government has used chemical weapons against its own people. >> to use potential weapons of mass destruction on civilian populations crosses another line and that is going to be a game-changer. >> reporter: but notice he said potential. the president said the evidence is still not definitive. >> we have to act prudently. we have to make these assessments deliberately. >> reporter: the president has resisted taking military action in syria or even arming the rebels. that's what could change. jay, did the president mean it when he said use of chemical weapons would be a game-changer in syria? >> yes, he did. >> reporter: so, what does that mean? >> the president made clear the use of, or the transfer to terrorist groups of chemical weapons by the assad regime, would be crossing a red line. and he retains all options to respond to that -- >> reporter: including military force? >> all options. all options. >> reporter: all options may be on the table, but the military option appears to be the last option. white house officials have made it clear repeatedly that the president is not going to rush into another war in the middle east over weapons of mass destruction. david? >> but as you say, all options on the table. our chief white house correspondent jonathan karl tonight. jon, thank you. overseas this evening tonight to bangladesh, where rescue workers are racing around the clock to save survivors trapped after that huge building collapse. among them, we learned, two babies born underneath that debris. here tonight, abc's muhammad lila. >> reporter: with a desperate search into its third day, beneath the twisted, broken building, a new glimmer of hope. a pocket of air keeping 50 people still alive. also rescued today, two women who miraculously gave birth while they were trapped in the rubble. tonight, they and their newborn babies are doing just fine. but despite today's new hope, the devastation here is massive. "i can't find my daughter," this man cries in the scorching heat. "she came here for work and left her 2-month-old baby still at home." thousands rioted on the streets as this video taken the day before the collapse, shows giant cracks clearly visible. police ordered the building evacuated, but workers say they were later ordered back inside. as north american clothing labels are found in the debris, now the race is on for more miracles before time runs out. muhammad lila, abc news, islamabad. >> just a devastating scene unfolding there tonight. muhammad, thank you. and back here in this country tonight, and to the growing anger at the nation's airports. all week, we've been reporting here from the frustrated travelers, and it's understandable. in fact, listen to some of them right now. >> we finally went back in, unloaded and then we were going to load again and unload and then they said the flight was canceled. >> i'm angry about this. >> little frustrating, especially at 3:00, 4:00 in the morning. >> i was stuck in one of those terminals with them this week. tonight, word of possible relief from capitol hill. could it be? abc's david kerley live at reagan national tonight. david, what's the latest? >> reporter: well, good news for these travelers and you, as well, david. because the president says he is going to sign this quickly-approved congressional measure to put air traffic controllers back in the towers. this after really a difficult week. since sunday, through yesterday, thursday, more than 5,000 flights have been delayed. what congress has agreed to do is to allow the faa to move money from one account to pay their controllers. all 15,000 controllers should be back on the job, no more furloughs. and lines like this and flights should -- should -- be getting back to normal soon. david? >> david, a lot of people wondering if lawmakers acted so quickly on this because they wanted to fly home themselves. >> reporter: you know, they all left town because they have next week off and they were flying today. so, undoubtedly they wanted to get this. and they heard the complaints, as well. >> all right, david kerley tonight at reagan national. david, thank you. we're going to turn now to that intense flooding in the midwest we've been showing, as well. look at thwns in illinois tonight. a man in a boat heading right there down water street in grafton. water up to the stop sign there. in peoria heights, the manager of an apartment building walking on a makeshift bridge. it's been incredible to watch these images come in. abc meteorologist ginger zee in illinois tonight. tracking all of this. ginger, great to see you. and if there's any silver lining to this, what could it be? >> reporter: it would be the drought, because we've seen significantly reduction or even elimination of the drought, thanks to all of that rain. even though the flooding, horrendous in a lot of places. i want to bring you to a graphic here. on the left side, what you'll see is august 2012. the drought, terrible in places like iowa, missouri, arkansas and illinois. on the right, that was put out today by the u.s. drought monitor. look how many places are either having absolutely no doubt or so, so much better. places like chicago that got their april wettest on record. enjoying one of their driest days today. >> meteorologist ginger zee with us tonight from our chicago bureau. ginger, thank you. see you this weekend. and tonight here, we remember a country great. we learned today that george jones has died. ♪ he said i love you til i die >> reporter: george jones lived his life like a country song. revealing his sadness, his loneliness, his loves and loves lost. ♪ all dressed up to go >> reporter: many of today's country stars have called him the greatest living country singer. tonight, they remember him and the song that surprised even george jones himself. ♪ he stopped loving her today >> reporter: he was born in 1931 with a broken arm in sara ttoga texas. he remembered watching the grand ole opry with his parents. >> i said, momma, if i go to sleep, you wake me up when bill munroe comes on. and then eventually i was about 9 years old when i got my first guitar. you could beat me to death and i wouldn't let it down. >> reporter: his first number one hit in 1959. "white lightning." ♪ white lightning >> reporter: he battled drinking, battled with his loves, too. he met rising country star tammy wynette. in 1966, they married. she was his third wife. >> do you love me? >> reporter: along the way, he would reveal the secret behind his music. >> it's like reading a storybook, it's so true and so sad and i really get to live in that song in my mind, you know? >> reporter: it was just last year, at 80 years old, he announced plans to tour again. he planned to call it, like his song, "the grand tour." ♪ and this old house will never be the same ♪ ♪ without the love that we once knew ♪ >> no doubt george jones' music will be playing across america tonight. still much more ahead on "world news" this friday evening. with so much disaster in the news lately, a simple question for all of us at home. what would you do when danger hits? the eye opening mistakes caught on tape, right after the break here. and later tonight, the gator suddenly taking over the golf course. the guy in the golf cart there, frozen. why didn't he put the pedal to the metal? 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tonight's "20/20" examines what to do in an instant, to save your family. tonight here, abc's matt gutman on why basic instincts aren't always the best ones. >> reporter: there's an instant, when chaos erupts, that humans decide to join a fleeing herd or become heroes. >> that instant is really amazing. some of us are hardwired to run. and other people are hardwired to fight. >> reporter: in boston, dozens chose not to run. but just this week in denver, 20,000 people at a rally stampeded. so, what makes most people act the way they do? >> what's fascinating about crowds is that we all tend to follow them. >> reporter: just look at a classic psychological experiment illustrated here. a woman sits quietly doing her work. smoke starts pouring in. she's visibly worried. still, five minutes go by. the other people in the room, all in on the experiment, ignore the smoke. >> she's just sitting there. no one else is reacting. >> reporter: 10, 15, 20 more minutes pass. she still doesn't move because the others don't. >> that's how powerfully socialized we are. >> reporter: socialized to death in some cases. but psychologists say some people are hardwired to run against the grain. surging towards the flash point. >> when i stepped into the street, you get a sense of tunnel vision. i ran as fast as i could to the epicenter of the blast. >> reporter: michael chase, in the blue jacket, is a few feet away from dzhokhar tsarnaev. after the blast, he ran towards this little girl to help. >> i didn't think twice about it. >> reporter: amidst the herd. >> it's just something that you do. >> reporter: a hardwired hero. matt gutman, abc news, miami. >> we will continue the myth-busting tonight. tools for everyone. heaven forbid something happens to you or your family. it is eye opening. a special "20/20," in an instant. that's 10:00 eastern, 9:00 central, a little later here. and coming up on "world news," look at the surprise that washed up onshore in california. authorities just a short time ago confirming where it came from, traveling more than two years to get there. 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[ male announcer ] be sure to talk to your doctor before you begin an aspirin regimen. it can happen to anyone. talk to your doctor. now to our friday "instant index." what's making headlines. two years after the tsunami in japan, look at this tonight. a boat has washed up on shore in california and this evening, confirmation it is from japan. floating more than 5,000 miles across the pacific. it is the first time debris from japan has reached california's shores. if you're like me, always running a little late, a possible change from mcdonald's you might welcome tonight. perhaps you remember adam sandler at the counter at mcdonald's. he just wanted some breakfast. they were not budging with that 10:30 a.m. cutoff. >> what else? we'll take hot cakes and sausage. >> sorry, sir. we stopped serving breakfast. >> what are you talking about? we're four seconds late. >> no, you're 30 minutes and four seconds late. we stop serving breakfast at 10:30. >> oh! >> hope adam's watching. the ceo of mcdonald's tonight saying he will consider serving breakfast all day. now to the gator and the golf cart. we all saw this on "gma" this morning and wondered why the guy in the cart didn't floor it. watch as the gator creeps right up next to him. the rules official, mickey bradley, there in the golf cart, he backs up a little bit, but he barely flinches. late today, he told us it was a little nerve wracking. >> well, i was a little nervous, but i've been around alligators and -- i don't think he sensed me being afraid of him. i just was letting him go on by. >> and he did go on by. a braver man than the rest of us. when we come back here on the broadcast, the famous singer, the famous song, suddenly hot all over again. singer, the famous song, suddenly hot all over again. who is our "person of the week"? man: i name of eight princesses. i'm on expert on softball. and tea parties. i'll have more awkward conversations than i'm equipped for, because i'm raising two girls on my own. i'll worry about the economy more than a few times before they're grown. but it's for them, so i've found a way. who matters most to you says the most about you. at massmutual we're owned by our policyowners, and they matter most to us. ready to plan for your future? we'll help you get there. to prove to you that aleve is the better choice for him, he's agreed to give it up. that's today? 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