Amerikabomber contract competition in WWII Nazi Germany Luftwaffe for a space bomber capable of striking the United States from Germany
Prize competitions
Ansari X Prize, the first X Prize Foundation prize for achieving repeated suborbital spaceflights using a space tourism capable vehicle, which was won by the SpaceShipOne team of Mojave Aerospace Ventures composed of Scaled Composites, Burt Rutan, Paul Allen and Vulcan Inc.
Google Lunar X Prize, the X Prize Foundation prize sponsored by Google to put a robotic rover onto the Moon, won by no team
America's Space Prize, the Bigelow Aerospace sponsored prize to create an American orbital space tourism capable vehicle, won by no team