- i don't have a lot more detail on this than that. - when i got to st. vincent's hospital, i could see the doctors out on the street and the nurses, and they already had stretchers out, and i realized they must be getting ready for something very big. ♪ ♪ - i'm in the north tower. we felt a vibration. we thought it was an explosion on the upper floors, but it wasn't. [engine roaring] [loud explosion] [people screaming] - oh! - oh, my god! - oh! something else just blew up! - oh, my god, another plane has just hit. it hit another building. - you saw a plane? - yes, i just saw a plane go in...