More than 20 years after 9/11, hundreds of families still wait for word of a missing loved one, as the NYC Office of Chief ...

About 45 seconds into the six-minute clip, the North Tower succumbs, eliciting shock from those watching. Five minutes later, ...

About 45 seconds into the six-minute clip, the North Tower collapses, eliciting audible reactions of disbelief. Approximately ...