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

we'll tell you about one retired marine that leads seals through grueling exercises hogue to prepare them for any dangerous situation they may face. julie banderas has more. >> julie: the training program helps special warfare candidates pursuing careers in the military while the pre-training classes like these are just around the country, this program is especially unique. alan, a retired marine has been doing this in connecticut for about 11 years volunteering his time two to three times a week to put the future seals and marines through a combination of exercises and military exercises. he teaches them how to work beyond their physical and mental limits. he says it takes more than just being in good shape to make the cut. >> it's not about a skill, how far to throw the ball but do you have the mentality when the chips are down and you lost your guys and you are getting hammered and there is ten times more enemy than you thought, will you have courage the mental fortitude that spirit that i talked about before and go any way? >> julie: the lucky candidates that come to him they get