When we first took our troops out of Vietnam in 1975 helicopters had an issue with places to land. There were no large, level clearing to land a helicopter in. Soldiers ended up having to cut trees down and throw unneeded helicopters into the ocean. Nothing has really changed much since 1975. You still need a large, level clearing to land your helicopter. This can prove to be an issue if you're trying to land your helicopter in the middle east or anywhere that is a desert, or has a lack of level ground. DARPA has come up with a new idea that could let helicopters land on the most uneven of grounds. DARPA wants to give helicopters 4 autonomous legs, independently driven, that have built-in distance sensors. These sensors can see how uneven
