I saw the video and everybodys dancing and so happy. And thats what you see in puerto rico. And the moment he learned that Justin Bieber wanted to sing it in spanish. But first the nightline five. Good evening. Thanks for joining us, startling accusations against the boy scouts of america from a man who says he has suffered in silence for decades. He is speak out about what he says was years of abuse by a former troop lau leadeeader and some of the blame on the boy scouts. He trained me to not say anything. Reporter chris was an 11yearold new jersey boy scout when his life became consumed with a dark secret. You do everything you can to block it out of your mine. Reporter he says his boy scout leader sexually abused him hundreds of times over five years. I cant tell you how many times. Reporter chris, whose last fla name we are withholding says that the leader became a trusted family friend and things took a sickening turn just weeks after he hit puberty. He said theres beer in the fridge. Help yourself, whenever you want take whatever you want. He breaks out a stash of porn and one thing led to another. I was 11 and essentially intoxicated and not knowing what to do. How did you react . I was frozen. I didnt know what to do. I was stiff as a board. Reporter chris says he is coming out of the shadows sharing his story two decades later. His adulthood plagued by depression, anxiety and anger. I have had this whirlwind of mess throughout my adult life. Im 35 years old and still feeling this. Reporter now chris along with two other former boy scouts have filed a lawsuit against the boy scouts of america saying they didnt do enough to prevent the sexual abuse. Look at his interaction with the kids. They chose not to look at it. Reporter he says there was no escaping it. How much alone time were you spending with steve . It became nine hours per week. Reporter it would continue on troop outings. There is an adult in his underwear. Those are his boxers. At what point does someone say theres a problem here . Reporter he says his troop leader provided scouts with alcohol. On some of the trips, it turned into a booze fest. Reporter and an adult friend of corcoran witnessing the abuse. He saw you and steve together. Yes. Did he confront steve . Yes, he said he played it off and the friend disappeared out of the troop and walked away from it. He didnt do what normal people would do and call the police. Reporter chris says the abuse ended when he was 16 but by then his former scout master was a close family friend and was a guest in his wedding. The guy made it into my wedding. I left him off the list and my wife asked me what about him . And i didnt have an answer to say no. At the time i couldnt justify saying no without telling the truth. Reporter his wife tina had no idea about the pain that chris suffered as a child. He opened up to her six years into their marriage. Jimmy what did he tell you . Steve abused me. I havent seen these pictures in years and hope to never see them again. But i had no earthly idea. Now i see pain. You see pain on that face . In that face, yeah. Reporter chris confided in his attorney at the time. I broke down to tears and just told him. What did you tell him . Exactly what happened. And that was the first time you reconciled it . Absolutely. How tough is that . Tough. In a statement to abc news the boy scouts of america writing they are outraged there have been times when scouts were abused and they apologize to victims and their families. In the many years since, we have continued to evaluate and strengthen our efforts to protect youth. Reporter bruce neagle represents chris. What do you hope to achieve in the lawsuit . We want to bring to light this is an epidemic. Reporter steven corcorans attorney maintains his client is innocent but corcoran, now 49 was found guilty of possession of child pornography. In june of this year he was sentenced to seven years in prison. What wlouould you say to him today . Why he chose me . I dont know. Reporter this is not the first time that the boy scouts of america has been accused of harboring abusers as scout leaders. A portland jury awarded a man 20 million in damages for the sexual abuse he suffered in the 80s by a former assistant scout master. If you want to join, please do so but be aware. Reporter lawyers successfully argued that at the time the organization knew he had a history of molestation. He served prison time, admitted as early as 1983 he had molested 17 boys. If you put the interest of your organization ahead of the safety of children, the guardians of the communitys safety which we call juries will hold you accountable. Reporter the monthlong trial revealed the scouts kept secret files of alleged child molesters for decades. The files are about 5,000 files of alleged in some cases proven sexual abuse in the boy scouts. Reporter the Los Angeles Times created this investigation. The idea of the perversion files with the scouts is they are intended to keep abusing scout leaders from rejoining after theyd before found out. Reporter in the past they have said scouts are safer because those files exist. Congre congre according to the Los Angeles Times it followed a familiar pattern. The scout leaders would groom the kids, buy them alcohol, show them porn and then the abuse would start. Reporter the newspaper said in many cases the boy scouts did not report the alleged abuser to the authorities. The victims suffering in secret. Its a lifelong scarring thing for a lot of these kids. Reporter the boy scouts of america has since implemented new policies including criminal background checks, requiring two very more adults to be present at all scouting activities, prompt mandatory recording of any allegation or suspicion of abuse and a help line to report suspected abuse. As for chris, he says intense therapy and the support of his wife are helping him heal. If and when he wants to tell me more than he has, he will. But he needs someone to take care of him. Reporter im paula faris in new jersey. Up next, luis fonsi describes creating his hit song, desposito and what he likes most about the Justin Bieber collaboration. When youre close to the people you love, does psoriasis ever get in the way of a touching moment . If you have moderate to severe psoriasis, you can embrace the chance of completely clear skin with taltz. Taltz is proven to give you a chance at completely clear skin. With taltz, up to 90 of patients had a significant improvement of their psoriasis plaques. In fact, 4 out of 10 even achieved completely clear skin. Do not use if you are allergic to taltz. Before starting you should be checked for tuberculosis. Taltz may increase your risk of infections and lower your ability to fight them. 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Reporter the first mostly Spanish Language song to reach the top spot in over 20 years and outside the latin music world most have not heard of luis fonsi. You are a 20year overnight success. Thats exactly it. Does it feel fresh . It does. It feels like this is my first album and im new to the game. Reporter fonsi is no stranger to chart topping hits. A latin grammy Award Winning performer known for ballads like this one. But it was despacito that helped him reach an International Audience including none other than Justin Bieber who says after dancing to the song he wanted in. We had a fullon english translation and vocals recorded in english and we thought he was going to the an english version. But he took the time to learn in the spanish. People are impressed with biebers spanish accent. Its legit . It is legit. Reporter fonsi said it is a dream come true that started with a simple rhyme. I had this melody and and this word. And i had to rhyme puerto rico which is where im from and i had a writing session that afternoon. Reporter ek ka ender is a latin grammy award winner herself. I Start Playing it for her. And we started to make the whole thing from scratch. And four hours later we had despacito. We knew it had to be urban fusion in a certain way. Thats whats going on right now. Reporter and thats where daddy yankee came in. Then i tell him, why dont we talk about a man that is trying to get to a woman in a very nice way because this genre is very aggressive with women and this song is respectful. Reporter the videos director says fonsi had a simple, yet poignant idea for the video. Like a day in the life of the culture of puerto rico. Were talking about who the lead could possibly be we all knew it had to be someone who felt credible in the environment and above and beyond all, really was a true representative of the beauty in the caribbean. Reporter if showcasing puerto ricos beauty was the goal, Zuleyka Rivera was their answer. He said i just want you to feel the music. I just want you to be here. Walk from here to there. And just feel the music. Whatever you feel about the song, just do it. So pretty much i was freestyling. Ms. Puerto rico reporter thats her in 2006 being crowned Miss Universe bringing home the win for puerto rico. The dress in the video a nod to that pageant dress. Everybody is having a great time, dancing and so happy. And thats what you see in puerto rico. Every time you go to puerto rico. Reporter turns out the single most watched Youtube Video of all time with 3. 7 billion views and counting was all shot in one day. And edited here in this small studio in miami. The finished product . A song so infectious it inspired van videos from around the world, translated into dozens of languages. Reporter even sesame street with their version. Its been like a fever. Its crazy. This feels like a love song to puerto rico. I think the star of the show is puerto rico. Its a special place. And its an inspiration behind my music. And now to be able to sort of represent puerto rico through my music is a dream. Reporter fonsi was named tourism ambassador for his beloved puerto rico, his song used to lure visitors. We begin with a monster hurricane gaining strength in the atlantic. Reporter puerto rico was battered by Hurricane Irma, leaving a third of the island without power. As fonsi put out this warning. And later joining other celebrities to raise millions in relief, all part of the hand in hand telethon. As the island braces for another hurricane this week the video is now serving as a reminder of whats under threat. And yet at the same time for the creators, its a heart felt ode to their puerto rico. It doesnt matter language. It doesnt matter the culture. Its to enjoy life. Exactly what you see is what everyone was feeling. Im just thankful to know that 3 billion times people saw this video and sang the song and saw the beautiful sights. Reporter and for the rest of us, a reminder of the summer that was. Up next, we are tracking hurricane maria, barrelling towards puerto rico, how people there are preparing for the worst. Stay with us. Announcer abc news nightline brought to you by geico. I just saved a bunch of money on my Car Insurance with geico. Huh. I should take a closer look at geico. Geico can help with way more than Car Insurance. Boats, homes, motorcycles. Even umbrella coverage. This guys gonna wish he brought his umbrella. Fire at will howd you know the guys name is will . Yeah . Its an expression, ya know . Fire at will . You never heard of that . Oh, there goes will bye, will thats not his name take a closer look at geico. Great savings. And a whole lot more. I even accept i have a higher risk of stroke due to afib, i accept i take easier trails than i used to. 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Throughout history, the one meal when we come together, break bread, share our day and connect as a family. [ bloop, clicking ] and connect, as a family. Just, uh one second voice guy. [ bloop ] huh . Hey . I paused it. Bam, family time. So how is everyone . Find your awesome with xfinity xfi and change the way you wifi. Finally tonight tracking yet another potentially devastating storm in the caribbean near many of the islands slammed by irma. Hurricane maria a category 5 with sustained winds up to 160 miles an hour. Rob marciano is in puerto rico bracing for a catastrophic hit. Reporter puerto rico boarding up, the second major hurricane bearing down on the island in less than two weeks. Flights to san juan usually packed with tourists, mostly residents scrambling to get back home. Are people nervous, scared . Definitely. Its been a while since we had such a strong hurricane hit us directly. Reporter the eye of Hurricane Irma passing just north of here. Winds on the island reaching 70 miles an hour. Devastating the Virgin Islands and the island of st. Martin, destroying some 90 of the buildings on the island of barbuda. We cannot afford to become complacent. Reporter the islands racing to clear debris left behind by irma. All of the debris, were worried about that becoming