The U.S. Air Force's robotic X-37B space plane – after circling Earth for a record 718 days – touched down May 7 at the Shuttle Landing Facility at NASA's Kennedy Space Center. It was the first landing at the SLF since the final space shuttle mission came back to Earth in July 2011. The X-37B launches vertically and comes back to Earth horizontally for a runway landing.

Find out more about this mission here.