7.9K views · 485 reactions | The United States Air Force's X-37B Orbital Test Vehicle mission 4 landed at NASA - National Aeronautics and Space Administration's Kennedy Space Center Shuttle Landing Facility May 7, 2017. Managed by the Air Force Rapid Capabilities Office, the X-37B program is the newest and most advanced re-entry spacecraft that performs risk reduction, experimentation and concept of operations development for reusable space vehicle technologies. | Airman Magazine | Facebook

#TBT The XB-70 Valkyrie was the largest x-plane. Capable of flight at speeds three times the speed of sound (2,000 miles per hour) and altitudes of 70,000 feet, the XB-70 was used to collect in-flight information for use in the design of future supersonic aircraft.This video shows an XB-70A taking off from Edwards Air Force Base. To learn more about the XB-70 Valkyrie, visit: http://go.usa.gov/ct2aT | NASA's Armstrong Flight Research Center