The Nano Air Vehicle could be the smallest UAV in the world, since it does away with a propeller and engine in favor of moving wings instead. So far, AreoVironment has been endowed with over more than half a million dollars from DARPA and given half a year to demonstrate its diminutive UAV to the military. I think this will probably be used to function as a spying device in place of sending an actual double agent. Hopefully the enemy doesn’t catch on and continueu thinking that this is some sort of weird insect instead.