US Military Space Plane Wings Past 500 Days on Latest Mystery Mission by Space.com | Jan 29, 2019 | Uncategorized | The secretive mission of a U.S. Air Force X-37B miniature space plane just winged past 500 days in Earth orbit. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Like this:Like Loading... Related
