HALO jumps are used to enter hostile territory undetected when threats to both Airmen and aircraft are expected.
Armed With Science Segment One
When you're a military force like the U.S. Army, having the right materials can make all the difference. In order to get the best bullet proof vests, the best electronics, the best vehicle armor they can get, they have to go out and find the best materials. There is a group of scientists and engineers at the Army Research Lab who are turning this thinking on its head. Instead of just scavenging raw materials from the environment, they're designing them. One atom at a time.