they sledgehammer, kick, shoulder their way into every available opening. you guys look like you like to break things. >> a type a personality. >> reporter: they are called technical rescue specialist with the virginia team, more like storm troopers. these guys have to barrel into the most dangerous structures after an earthquake or some money and look for survivors. they go into unknown danger, contorted into every opening and the sound taller buildings that seem to be on the verge of collapse. one of the most treacherous you could imagine. what was your closest call? >> in haiti, we were tunneling through and there were aftershocks. when you are in a small times in place and hope for the best knowing your team is behind you to come get you if something happens. >> on that day, carver tunld his way out. on this one, tsunami waters came