The never before seen deposition tapes 25 years after he was acquitted of murder. What he says about hitting his exwife. You had your fingers around her throat, correct . I could have touched her neck, yes. The dramatic moment hidden for years. Youll see it only on gma this morning. And we do say good morning, america. The feeling here in new york city, simply electric. With pope francis in town. Take a look at these images. Which. Oh, going down fifth avenue, the sidewalk packed with people and almost as many cameras. A lot of police car, a lot of cameras. A live look right now at the papal nuncia residence. Hell speak at the 9 11 memorial, schoolkids up in harlem then a walk through central park later this afternoon. This mornings New York Post in the spirit changing their name to the new york pope. It has been an incredible week and, george, youre just getting back from d. C. Where he was. How was it . So many memorable images. We remember sophie cruz, that 5yearold girl who broke through the barriers was handed over to the pope then yesterday after that passionate speech before the congress, the pope appearing there with Speaker Boehner crying on the balcony and look at that sight, 50,000 people spread out across the west lawn of the capitol. That good feeling is taking itself right here to manhattan. And we have full Team Coverage today following the pope every step of the way. Abcs cecilia vega stars us off at the 9 11 memorial. Good morning, cecilia. Reporter george, good morning to you. The pope will be here in just a couple of hours. This is his chance to meet with victims families and First Responders and i can tell you security in this neighborhood and all over the city at an alltime high. An electric scene in midtown manhattan. The pope greeted by hundreds of thousands lining the streets of new york city as he made his way to st. Patricks cathedral. Escorted by a massive motorcade moments after landing at jfk from washington on his plane called shepherd one and greeted by the big apples favorite anthem. Inside st. Patricks, francis stopping to bless the 17yearold disabled girl. Just to actually meet him and be in his presence is such a blessing. Reporter his homily drawing thunderous applause from the crowd thanking american nuns calling them women of strength after condemning clergy involved in the churchs sex abuse scandal. Pope francis departing to cheering flag heave waving fans who strained just to catch a glimpse. He finally retired for the night in the vatican owned town house. In washington, the day before, the popes historic joint meeting with congress brought some to tears. Including speaker of the house john boehner. Most of us were once foreigners. Reporter vatican officials saying its important for the spanishspeaking pope to deliver that message in english. He spent months practicing, but this morning it is back to a packed big apple schedule. A visit to the u. N. , a presession through central park and a mass for 20,000 people at Madison Square garden including a serenade from broadway stars like Harry Connick jr. , Jennifer Hudson and gloria estefan. Theres a lot of emotion. Theres a lot of devotion for him in that room and its just a very different kind of feeling than in one of my concerts. Reporter no time to rest in the city that never sleeps. And the pope will be here again in just a couple of hours for this 9 11 memorial. Now, among the people who will be here to greet him a rabbi and an imam, george. They will all be joining together in a prayer for peace. Thats way downtown then after that all the way uptown to meet with immigrants and their families. Reporter a busy day, as you said, yes, that meeting up in harlem and this theme of immigration has been a huge one for the pope during his visit and they will present him with a gift, things like a tool belt or a soccer ball. You remember the pope telling congress he too is the son of immigrants. This is a theme we be hearing for the next couple of days. Cecilia, thanks. Robin, another big speech today. He addresses the United Nations delivering a message to the world. Hes just the fourth pope to speak before the General Assembly and abcs terry moran is there at the u. N. For us this morning. Good morning, terry. Reporter good morning, robin. Pope francis speaks to World Leaders this morning here and theres no question hes one of them. Hes become a major player on the world stage and wants to talk about Climate Change and more deeply how it is linked in his view to a World Economic system out of whack, poverty, war, what he calls the throwaway materialist culture and wants to call on World Leaders to change policy in this area. A memorable moment last night at evening prayer praying for his muslim brothers and sisters, he said, offering condolences and sincere prayers for that terrible loss of life at the hajj and crossing the line between religions and in this christian, catholic environment reaching out as i said to his muslim brothers and sister, all part of his mission here in the United States and the world. Robin. And around the world, youre right about that, terry. Thank you. Stay with us all morning. We will have special live coverage of the popes speech at the United Nations and his visit to new york. Well move on to politics now, the race for president , your voice, your vote and the frontrunners facing challenges this morning. Carly fiorina shooting up to rival trump and stunning numbers from New Hampshire showing Bernie Sanders opening up a big lead on hillary clinton. Tom llamas tracking it all. Good morning. Reporter a new dynamic starting to form in the race, trumps competition thinking hes vulnerable but hes still far and away the leader on the gop side. The crowds came to see the pope but for some, first they saw the donald, the billionaire waving to the crowds from his cathedral on fifth avenue, trump tower. Trump still on top but the latest polls are showing him no longer growing. This morning, poll after poll showing Carly Fiorina and senator marco rubio as the biggest winners following last weeks Republican Debate and a new poll from wmur, our affiliate in New Hampshire, shows a shakeup in the Granite State lineup. If i quit talking to all the people who attacked me i would have crawled under a rock long ago. Reporter and senator rubio who mostly stayed away from trump no longer holding back. He really never talks about issues and cant have more than a tensecond sound bite on any key issue and has been exposed a little bit and is a touchy and insecure guy. Reporter trump calls him a kid who repeats what he hears in congress. They sit in the senate even though he misses most of the votes, by the way. Reporter look at these numbers. Here we go, sanders, clinton and biden. Check out Bernie Sanders, the vermont senator, a doubledigit lead over hillary clinton. George, back in July Hillary Clinton led this poll. Now its not even close. Okay, tom, thanks very much. Well cover a lot more on the race sunday on this week. Youll have a lot to talk about this sunday. Now to that horrific accident on a major bridge in seattle. A bus full of College Students colliding with a tourist duck boat. Four people were killed. Dozens more injured, many critically. Abcs ryan owens is in seattle. Good morning, ryan. Reporter good morning to you, robin. These duck boats are popular with tourists but witnesses say the driver of one lost control with fatal results. Dispatch requesting four additional units. Reporter the images are devastating, the casualty count staggering. Four students are dead, nearly 50 people taken to the hospital after this collision on a downtown seattle bridge. I got out of my car and there are just bodies everywhere. Reporter investigators say a socalled ride the ducks amphibious vehicle carrying dozens of tourists plowed into the side of a bus here thursday morning. Shot across all three lanes at full speed and people in the bus flew through the front of the windshield. Dozening l ins lying on the. Tourists on board the duck vehicle left stunned. Come around the curb and he was pointing out the harbor and next thing i know he hit this bus here and just spinning around and people were being thrown out of the duck. Reporter all four of the dead were on board the tour bus carrying International Exchange students for north seattle college. The school still working to notify the next of kin. Its too early at this point to draw any conclusions as to the cause of this accident. Reporter that will be up to the National Transportation safety board. This morning, the agency sending a team to investigate. Ride the ducks tour company releasing a statement expressing their condolences and saying they will cooperate with the investigation and that safety is their highest priority. And this morning, the Duck Boat Company here announcing they will not run any of their vehicles until monday at the earliest out of respect for all of those victims. George. Sad accident. Ryan, thanks very much. Tough weather. Tornado reported. Flash floods strike South Carolina overnight. Ginger, they caused real damage. You can see this flipped rv, johns island, South Carolina, where the tornado was reported. Not only flipping things but turning over trees, taking out power lines then this, you see that. Thats columbia, South Carolina, rescues ongoing, flash flooding bringing almost 2 inches of rain in just one hour. And the rain is still falling this morning. Most of it in north carolina, southern virginia but it wraps all the way into northern georgia and eastern alabama so something that well be watching as we go through the weekend because this is a slowmover. Robin, ill have a whole lot more in your nations weather. In the meantime, another bizarre twist in the case of the stanley cup winner accused of sexual assault. The attorney for Patrick Kanes accuser resigning overnight calling into question evidence outside the womans mothers home. Ryan smith is following the case for us. Reporter a bizarre turn indeed less than 48 hours after calling an investigation into that bag the womans lawyer dropping the case saying he lacks confidence in the story he was told. A stunning aboutface from the lawyer representing a woman accusing Chicago Blackhawks forward patrick kane of sexual assault. Attorney Thomas Eoannou calling it quits thursday. Its my ethical obligation to withdraw. Reporter one day after claiming in a press conference the accusers mother discovered this empty evidence bag torn open, wedged into her screen door, suggesting the kit had been tampered with. We know this because the bag has a label on it. It contains my clients identity. Reporter but now eoannou says he no longer believes that story citing an ethical responsibility to come forward. The manner in which i received it and it was represented to me, im uncomfortable with. Reporter and now Patrick Kanes attorney lashing out and not ruling out possible legal action against the accuser. The integrity of the accusations has been completely undermined. I feel that patrick kane has been victimized. Reporter but eoannou maintains that this turn of events should not detract from his former clients credibility in her case against kane and this morning, the accusers family releasing a statement to the buffalo news saying they are disappointed but we have every intention of pursuing this case to a just conclusion. Kane has not been charged with a crime in this case and has maintained his innocence. I am confident that once all of the facts are brought to light, i will be absolved of having done nothing wrong. Reporter the accusers now former lawyer claiming none of his team has ever seen anything like this. Authorities saying previously that all the evidence in this case remains in its original packaging. Robin. Ryan, thank you. Now amy with the other top stories starting with a landmark deal from china. Thats right. The president of china announced a sweeping agreement today aimed at limping Greenhouse Gas emissions. The deal comes as president obama prepares to honor his chinese counterpart at a state dinner tonight. The initiative would force Chinese Industries to buy permits to pollute creating an incentive for them to use cleaner energy. The socalled cap and trade system could be in place by 2017. Well, a u. S. College student detained in north korea was allowed to make a statement overnight. 21yearold joo wonmoon says he has not been able to contact his family but is in good health, moon who attends New York University admits illegally crossing into north korea back in april. His fate, however, remains unclear. Well, authorities in saudi arabia are promising a speedy investigation into that stampede that killed 719 muslim pilgrims near mecca. They died as two waves of people collided at an intersection. Wall street is reacting to news from Federal Reserve chief janet yellen. She says the fed is likely to raise Interest Rates before the end of this year. There was some concern about yellens health during her speech. She appeared disoriented and paused turns out she just got dehydrated and is okay this morning. Bmw is denying a report that claims the company manipulated emission tests on at least one of its vehicle, that report led to a drop in bmw stock. Meanwhile, top engineers at volkswagen are expected to resign because of that companys emissions cheating scandal. The Justice Department and the epa are considering criminal charges. And finally, attention, all you muscle men out there. Bigger is apparently not better when it comes to strength. A new study finds bodybuilders muscle cells are bigger, sure, but theyre not necessarily stronger than men who dont lift weights. Researchers say all that punching iron breaks down muscle fiber and after a certain point strength does not increase with size. They say if you want stronger muscles, you should just lift smaller weights with higher repetitions and that builds the strength. Like all the guys in the studio are going we all got to see those pictures again, okay, thank you very much. A doctor springs to action and saves the day, that story in 30 seconds. A great story for you. A quickthinking doctor saved the life of a toddler having trouble breathing on a transatlantic flight and linzie janis has the details. Reporter it could have been a scene right out of the 1980 hit tv show macgyver. Dr. Kreshi guru of buffalo, new york, jumping into action 10,000 feet in the air. If we did not intervene at the time i intervened it would have been much more dainius. Reporter he was on a 7 1 2hour trip from spain to new york when halfway through a 2yearold on board with asthma started struggling to breathe. His parents accidentally packing his medication in their checked luggage. I heard announcement looking for physician. I started thinking that i got to come out with a way so we can kind of provide the oxygen and the medication in a nice way. Reporter with no pediatric Devices Available and in true superhero fashion he turned an inhaler into a makeshift anyone lyzer using a water bottle, a plastic cup, an oxygen tank and oxygen mask. After two treatments the child felt better and at the end of the flight, he was playing with the mom and they were pretty happy. Reporter he is not just a Good Samaritan with an md. He is actually the director of robotic surgery at new yorks Roswell Park Cancer Institute and while the medical macgyver was able to come to the 2yearolds rescue at the end of the day the message is always carry your medications you need with you. Reporter linzie janis, abc news, new york. Thank goodness he was there. Yes. I like how she said medical macgyver. Indeed. More ahead this friday morning, an abc news exclusive for you, o. J. Simpson in his own words, a first look at the dramatic long lost tapes answering questions about his exwife nicole. See those bruises on her face. No. You dont see anything. No. The neverbeforescene exclusive video only here on gma. A major health scare for kim zolciakbiermann. The dancing star revealed she suffered a menfully stroke. Morning. St on her condition this what is that . Its you its me . Alright emma, i know its not your favorite but its time for your medicine, okay . You ready . One, two, three. [ both ] emma, emma bobemma bananafanafofemma feefifofemma emma very good sweety, how do you feel . Good. Yeah . You did a really good job, okay . [ female announcer ] to nurses everywhere, thank you, from johnson johnson. [ female announcer ] to nurses everywhere, how to save energy wow, insulating the house made our heating bill really small. How small . Tiny now get 20 off select roll insulation at lowes. Energy. Focus. Help turn your potential. Into reality. 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