Combat is a grizzly business, and despite the best efforts of medical evacuation crews, it's not always feasible to send rescue teams into the fray. The US Army is seeking to address this with "autonomous vertical takeoff and landing (VTOL) unmanned aircraft systems (UAS)" (read: drones) for dropping off medical supplies and picking up injured troops. In its latest request for research and development proposals, the Army calls not for new tools, but for the repurposing of current aircraft to do the job. Preferred candidates in the already unmanned class include the A160 Hummingbird and the K-MAX, while one of the suggestions for remote-control modification is the infamous Black Hawk. Makes the AR.Drone seem a little wimpy, doesn't it?