At 9: 03am, Flight 175 struck floors 77 to 85 of the building, with Mr Clark’s office at the top of the impact zone.“ Our room just got rocked, just destroyed in a second, ” Mr Clark told the Associated Press ten years later.... “ And it was for the next 10 seconds after that immediate impact – that was the only 10 seconds of the day that I was afraid.... Terrified, in fact.” There were three staircases in front of Mr Clark....