Top Secret Air Force Spaceplane Lands with Sonic Boom After Two Years in Orbit
GIF GIF made from US Air Force videos of the X-37B spaceplane landing at NASA ‘s Kennedy Space Center on May 7, 2017 (US Air Force) The US Air Force’s secretive X-37B spaceplane landed yesterday after 718 days in orbit—just twelve days shy of a full two years. What was it doing up there in…