US Air Force's Secret X-37B Space Plane Flies Past Mission's 500-Day Mark – Sputnik International

Science News

US Air Force’s Secret X-37B Space Plane Flies Past Mission’s 500-Day Mark  Sputnik International

The US Air Force’s unmanned X-37B space plane recently passed its 500-day mark on its fifth flight as part of the mysterious Orbital Test Vehicle (OTV) program.

Source: Science News