One World Trade Center Security Breach

Police explain how the 16-year old allegedly broke into the 9/11 memorial.
3:00 | 03/21/14

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Transcript for One World Trade Center Security Breach
Thanks very much. We turn to that security breach at what was supposed to be one of the most heavily guarded buildings on Earth. A 16-year-old boy made it all the way to the spire of one world trade center and ABC's gio Benitez is on the scene right now. Good morning, gio. So hard to believe 24 was even possible. Reporter: Yeah, George. Everyone is just stunned. I mean here we are at the site of the 9/11 attacks and still a kid, a teenager, was able to walk right in undetected. This morning serious questions over how this 16-year-old allegedly broke into and climbed what's supposed to be one of the most secure buildings on Earth, one world trade center. "The New York post" which broke the story published these photos of him on top of other buildings and swinging from cranes in the past. But how does he allegedly breach the 9/11 memorial site? It's a huge lapse in security. He shouldn't be able to even get on that property. Reporter: Police tell ABC news the New Jersey teen squeezed through a one-foot opening in a fence around the construction site at 4:00 A.M. Then climbed the scaffolding up to the sixth floor, took the elevator to the 88th floor without eliciting suspicion from an elevator attendant then walked up the stairs to the 104th floor where he went right past a sleeping security guard. Once on the roof he climbed a ladder up to the antenna at the very top of the building seen here when George stephanopoulos took "Gma" on a breathtaking tour in 2012. Then at 6:00 A.M., he is busted. A construction worker spotted him and police moved in. A security official tells us there are no working cameras above the 88th floor. It's shocking and troubling. Reporter: The teen's friends saying they helped him scope out the site a few types before figuring out how to break in. Another friend telling us he was the leader of the pack. He's the type of kid who would see something, people would be like you're crazy for doing and honestly, that's nothing and would do it. Reporter: The port authority saying "We continue to reassess our security posture at the site and are constantly working to make this site as secure as possible" as for the sleeping guard, he's been fired. And we were able to reach that 16-year-old overnight. He had no comment but he does have a lawyer. He's been charged with criminal trespass and faces more than three months in jail, George. Okay, gio, thanks very much. Boy, Amy, you were talking about -- I don't want to condone what he did in any way, shape or form but he's done everyone a service, a real wake-up call. Everyone knows it can happen now. Teenager. Incredible. Unbelievable guest that had people gasping on the "Wheel of

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

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