Nik Wallenda to walk high wire over Times Square

The legendary highwire acrobat announced on "GMA" that he and his sister will embark on a never-before-attempted high wire walk 25 stories above Times Square.
6:26 | 05/23/19

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Transcript for Nik Wallenda to walk high wire over Times Square
Well, the fun is out of that. We begin with an ABC news exclusive interview with NIK Wallenda who is opening up about that terrifying 2017 accident that left his sister and several other members of his troupe severely injured. He's here to unveil his next daring feat and we're going to talk to him in just a moment. But first Paula Faris has a look at the story. Good morning to you, Paula. Reporter: Yes, the wallendas are back. This new feat will be bigger, better and more daring than all of the others. Wallenda says this has been on his bucket list. His death-defying stunts and high-wire theatrics has earned him the nickname, the king of the wire. NIK Wallenda, a seventh generation wire walker from the flying wallendas does the unthinkable. 700,000 gallons per second. Reporter: Crossing the churning abyss of the niagara falls. Trekking the span of the grand canyon on a two-inch-wide cable without a safety harronness. Hard to relax when you're 1500 feet above the canyon. Sometimes doing it blindfold. This is what I was made for. Reporter: But it was this one gone wrong that left many wondering if Wallenda's luck had ran out. Five high-wire performers lost their balance during a practice in 2017 while trying to break a guinness world record plummeting more than 30 feet to the ground. The three others including Wallenda clung to the wire. The group had been rehearsing a complex eight-person pyramid when they slipped. Extremely lucky given the height of the fall they survived. Reporter: Everyone survived but his sister suffered serious injuries breaking all the bones in her face. I know that I struggled with having to relive that accident and actually struggled with fear for the first time ever. Reporter: But now two years later he back and ready to take on a new challenge. And this is his sister's first time walking a wire since the accident. She suffered the bankrupt of the injuries. As for that video of the harrowing accident in 2017, none of the performers have watched it, Michael, that's a decision they made together. We understand that and now joined live now exclusively by NIK Wallenda. NIK, thanks for being here. You have a huge announcement. I do. It involves our home base in times square. That's correct. Yeah, so my family's first performance back in 1928 here in the United States was here in New York City. And I've always wanted to do something exciting and maybe show the world that the wallendas are still going strong and where we started here in new York City, so we have decided we would walk 5 stories above the streets of times square. Something that I've wanted to do for a long time. A long process. Something I've worked on since the mobile I got off that cable over the grand canyon and as you can imagine there's a bunch of permissions needed in order to make this happen so -- even more exciting is the fact that my sister who shouldn't be alive right now miraculously has recovered to the point where she's going to make that trek with me. When you said we you meant your sister as well as others but is this her first performance since the accident. It is. This is the first time she'll be performing. It took her about a year before she could actually step foot back on the wire. There's that analogy of getting back on the horse after you fall off and she was dying to get back on that wire doing everything she could to get back on that wire and in the hospital and all of her physical training to get back there and took about a year and she's been training for this walk since then. Our viewers at home, they can see and they're watching the accident now but you've never actually seen it. I haven't. You know, we made that decision as a group together. You know, it's something that, of course, will live with me forever and unfortunately it's something that I can replay in my mind over and over again. I don't need to see the video because I was there and, of course, we know of PTSD is something that's real and more real to me than I ever realized it was and I have to relive that occasionally and I've worked very hard to overcome that and, in fact, that's a lot of what my family do is we hope that what we do inspires others that you can overcome any challenge you might be facing. Whether it be a battle of cancer, you're on that wire too, right? You've got to make it to that other side so we try to use that to inspire people and what greater inspiration than an amazing single mom that has went through an experience, again, that she shouldn't have lived through and not only has she lived through it but she's about to make this amazing historic walk in New York City. Seven generations of your family. You're going to perform with your sister in times square. How emotional is it going to be to start here, the first performance by your family here in New York, you're going to do it with your sister. Is that going to be emotional for both of you. Extremely. My biggest concern is that I'll be concerned for her. You know, whenever I've walked a wire I'm more concerned about them than myself so I to a lot of my focus will be live here June 23rd on ABC, I'll be concerned about her more than I will be about myself. Family and friends. You had other friends injured as well. They're all doing well. In fact, every one of them have returned to performing in one capacity or another which is again it's miraculous. The last time we had an accident in 1962, they were doing the seven-person pyramid and that fell and two of my uncles were killed and one paralyzed from the waist down so we're blessed to be alive. So many people have seen the video, people listening to you right now who are thinking, why do you want to continue to do this. What is the motivation? You know, I touched on that a little bit. I hope to inspire people facing fears that we face on the wire that fears are, you know, I say it often, fear is a liar. Fear -- people think fear protects you from getting hurt and the fact is fear keeps you back from your greatest goals and your greatest achievements often in life so we do what we do to inspire people that nothing is impossible that you can overcome the greatest challenge you might be facing in life. I tell you what, it's inspiring. We appreciate you being here this morning to share this with us and we'll be watching you guys up there. Awesome. Thanks so much. 25 stories above times all right, George, over to you.

This transcript has been automatically generated and may not be 100% accurate.

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