Forty minutes. That's how long it took for Aaron and James to reach the ground floor. Once there, they found rescue workers helping people out of the building. James and Aaron ran around rubble heading towards the front entrance.

"Hey! You two!" Both men turned to see a rescue worker jogging over to them. "Once you reach Liberty Street you should run." The man advised seriously, before running off once his name was called.

Aaron and James didn't need to be told twice. They got out of the building as fast as they could and once they were on Liberty Street, they ran.

Once they were two blocks away, they slowed to a jog.

"James, look! The Tower is going to collapse!" Aaron said, pointing and shaking James' arm.

"There's no way it will. The structure is too strong-" James never got to finish his sentence.

At 9:59 am, the South Tower began to collapse, taking 614 people with it.