Since the very inception of manned flight, the United States has invested heavily into fielding game-changing military aircraft that leverage cutting-edge technology to provide a tactical or strategic edge over the nation’s peers or competitors.But for every F-117 that makes it into service, there’s a long list of aviation programs that never quite made it, for reasons of economics, politics, or the technical limitations of the day. Let’s talk about 7 aircraft that could have changed the game… but were canceled before they could.