now word of search and rescue robots being deployed in japan. here to walk us through the specifics is robotics expert hendrick christianson from georgia tech here in atlanta. thank you for being with us. sure. let s talk about the robots. we know of certain didn t kinds of robots already on the ground in japan. i want to ask you about one called the active scope camera, a camera that snakes around and can get places where people can t get. it s about an inch thick, about 27 feet long. wow. can crawl. like a snake t can crawl through debris. even if you have dense degree, it with crawl through those structures. it s looking for whatever you want to see. it s looking for people, debris, maintaining is it safe to go there? can we send in other first respo responders. but primarily it gives you a sense are people in there. has this been used before?