On April 22, 2010, the U.S. Air Force launched the super-secret X-37B space plane on its first spaceflight. See how it happened in our On This Day in Space video series here.
On This Day In Space! April 22, 2010: X-37B Launches on 1st Top-Secret Orbital Mission
by Space.com | Apr 22, 2018 | Uncategorized |