X-37B OTV 4 Florida Landing
At Left: The X-37B is seen after landing at the Shuttle Landing Facility of NASA's Kennedy Space Center in Cape Canaveral, Florida on May 7, 2017. The unpiloted space plane spent a record 718 days in space during its classified mission. Watch video of the landing & see our full story!
(Editor's Note: This Slideshow was updated on May 8, 2017).