This Blackhawk Helicopter completed a pre-flight check list, started its engines, spun up its rotors and took off with no crew onboard. Watch all of it happen autonomously. | CNET

At the height of the Vietnam War, the US Military was deeply interested in implementing a new attack chopper that would pack a punch and pummel enemy ground forces in the dense jungles of Vietnam. The military also aimed to use it as a support vehicle to escort Hueys carrying soldiers and Marines to battle. The Sikorsky Company was already a renowned name in helicopter manufacturing, with the S-61, S-64, and S-65 models in production. But over that prior decade, the company had lost competitions