There's no standard set for the shape or form of drones, and the Army plans to use that to its advantage. Here's where the Black Hornet Nano comes in. This micro drone, designed by Norway-based firm Prox Dynamics, is small enough to fit in the palm of your hand, measuring in at a mere 4 x 1 inches and weighing only around 0.04 lbs. What's more, the PD-100 UAV features regular as well as thermal cameras and has a range of roughly 0.6 miles -- in other words, it's perfect for those missions that require stealth surveillance.