“Over the last 13 years of war, the military has collected a large arsenal of unmanned aerial vehicles ranging from systems that weigh tens of thousands of pounds to ones that can fit in a soldier’s backpack or pocket. It is these small systems — often weighing less than 15 pounds — that can be deployed quickly to fly over hills, peek past fences and look through trees as troops conduct missions.”
Source: Small Spy Drones to Expand Troops’ Eyes and Ears on Battlefield
