The United Launch Alliance Atlas 5 rocket unleashes two million pounds of thrust at 7:19 p.m. to blast off from Vandenberg Air Force Base in California on the NROL-35 mission.
Credit: Pat Corkery/United Launch Alliance
Atlas 5
Photos: Sunday’s return of X-37B after 718 days in space
This gallery of U.S. Air Force photos show technicians, wearing protective SCAPE suits, initially check for hazardous hypergolic fuel vapors around the X-37B spaceplane on the Shuttle Landing Facility runway and the subsequent tow of the vehicle to its newly-renovated hangar at the Kennedy Space Center.
Atlas 5
Video: Tribute to NASA’s retiring George Diller
NASA launch commentator George Diller called the Atlas 5 with Cygnus, his final liftoff as the voice of launch control before retirement next month. He has worked at the Kennedy Space Center for nearly four decades and served as the commentator for such memorable launches as Hubble, Cassini, Mars Pathfinder, the Spirit, Opportunity and Curiosity rovers and the final space shuttle mission.