What Has This Top Secret U.S. Space Drone Been Doing?
Oct. 15 (Bloomberg) -- After nearly two years in orbit, the Air Force's mysterious X-37B space plane is reportedly returning to Earth. There are many theories about the classified mission, but none have been confirmed. For now, here's what is known about the super-secret spacecraft. Video by: Alan Jeffries, Jennafer Savino. (Source: Bloomberg)