robert hogue reflecting on the events of september 11. here's his story. >> just prior to the event, i was standing at the window here you can see there's columbia pike, arlington cemetery in the river over here and i was standing here discussing with our corporal really how vulnerable the building was and the fact that we are in the flight path for the national airport. so recognizing that vulnerability and i think everybody recognized our vulnerability, i left; went through the door, took a left to go see the boss who's literally on the other side of this wall here and somewhere between the door and there, boom! that's when it all came apart. >> and when you say it all came apart, what happened? what personally happened to you? >> you have to recognize the floor itself literally just broke away from the building. on the other side of this wall is an expansion joint that runs from the outer wall all the way to the interior wall and the floor broke away along the line of the expansion joint. and the ceiling all came down. lights, pipes, w