Live coverage: Atlas 5 countdown and launch journal

The mission, dubbed NG-21, was the second out of three planned launches of a Cygnus spacecraft onboard a Falcon 9 rocket. Liftoff happened on Sunday, Aug. 4, at 11:02 a.m. EDT (1502 UTC).

Boeing’s Starliner crew capsule could take off in October on its first unpiloted test flight to the International Space Station, a company official said recently, while SpaceX finishes up the investigation into the explosion of its Crew Dragon spacecraft during a ground test earlier this year.

The NROL-35 Atlas 5 launch by the numbers.