When passengers boarded this plane bound for San Francisco, they never could’ve guessed what they would encounter near the tail-end of the flight. During the flight, just off the left wing — as visible in the video — there emerges a totally futuristic aircraft. What was it? Virgin Galactic’s brand new SpaceShipTwo and its mothership plane, the White Knight II. Even more impressive, the aptly named SpaceShipTwo (it literally goes into space) executed a parallel landing with the commercial airliner.