>> it was such a ferocious sound. my initial thought was we had a bomb that hit the fire station. >> he and his crew head out immediately to assess the damage. and when they get to the northridge meadows apartments, everything looks fine to him. >> the people that were out in the street said the building had collapsed. and we shined a light on the building, and it looked like it was fine. >> henry doesn't know it yet, but the building is anything but fine. steve langdon whose apartment is on the first floor is laying face down on his mattress still struggling to get to his feet. >> i couldn't figure out what was on top of my head because i couldn't get it off me. i was trapped. >> when firefighter mike henry and his team discover just what's pinning steve langdon and others trapped on the first floor of the apartment complex, it will trigger a massive rescue effort. but at the moment, all seems quiet at the meadows, at least to the rescuers. so henry and his crew continue on looking for victims. meanwhile, only a mile away,