What the US Military needs in this modern day is a radar drone similar to a Shilka ZSU-23 radar system that revolves 360 degrees every second to detect incoming ariel threats. Most drones already have motors for rotary blades and that energy could be modified for such applications in order to target other drones and keep high value vehicles and troops with real time battle field updates. Every drone needs to double as a radar detection systems regardless of type, not just surveil or attack.