told her, this is what i believe u.s. air hit. >> she has a responsibility to ensure its safety from other traffic. that didn't happen. >> the sound was almost overwhelming. >> david kelly, the surviving first officer, testified that he and the captain were never made aware of another plane on the runway. >> as far as we could tell there was nothing down the runway anywhere. udden showed up out of nowhere. >> cabin lights went out, emergency lights came on. >> for this flight attendant, who was critically injured, the hearing is an emotional experience. >> i was filled with gratitude when a passenger who survived came over and thanked me for my actions. >> as a consequence, intersection departures at night are no longer permitted.