The US government might still be keeping aliens from the world, but they’re no longer keeping this schematics of a supersonic flying saucer the US Air Force was considering trying to build back in the 1950s. Meet Project 1794.
Traditional conspiracy theorists would have you believe classified military UFO reports are all about flying saucers and little green men. Truth is, at least in Russia, the aliens had a penchant for aquatic locales—not space.