In this special APB: Behind the Badge episode, we return to Lower Manhattan in the terrifying moments following the collapse of the first World Trade Center tower.

A plainclothes police sergeant emerges from the chaos blinded, choking, disoriented—and alone. Nearby, a high school student watching the horror unfold, runs into the smoke and brings the sergeant to safety in a nearby church. What follows is an unexpected friendship between two strangers brought together on one of the darkest days in American history.