Live coverage: Atlas 5 countdown and launch journal

SpaceX test fires a Falcon 9 rocket in readiness for its planned 8 September 2018 launch carrying the Telstar 18 VANTAGE communications satellite.

Launching for the 200th time and loaded with one of its heaviest cargoes ever, the Atlas-Centaur rocket flexed its muscle and sped away from Cape Canaveral on Tuesday night with a U.S. Navy satellite for mobile communications to the military and White House.

Take a walk around NASA’s OSIRIS-REx spacecraft less than three weeks before its Sept. 8 launch on top of an Atlas 5 rocket. Rich Kuhns, the mission’s program manager from Lockheed Martin, points out some of the major features on the probe.