>> was used in florida when we had a collapsed garage. used on 9/11. used in a number of cases. the army corps of engineers also went to haiti with that kind of technology. >> that's one of the things you can use if there's a collapse. the other thing you can use if there's terrain that you can't easily get over. something called a quince robot. >> it's like a small tract vehicle with a pair of flippers that will allow you to go up and down staircases. it's relatively large. if you want to go to the second or third floor. and it's remotely operated. so somebody sitting a safe distance, basically using a joystick or a game pad driving it around. >> this might be used in a place where you're not sure of the stability of what you're climbing on. if you put human theres there a something collapses, you have