The media briefing came after the agency formally pushed back the launch of the SpaceX Crew-9 mission to the International Space Station from mid-August to late-September.

SpaceX’s 22-story Falcon 9 rocket stands on Cape Canaveral’s Complex 40 launch pad Sunday, hours before the scheduled liftoff of a pair of commercial communications satellites for Eutelsat and Asia Broadcast Satellite.

During its return voyage to Port Canaveral in Florida, a SpaceX Falcon 9 first stage booster, tail number B1058, toppled over and broke in half. The booster has made 19 flights including launching NASA astronauts to space for the first time from American soil after the Space Shuttle program ended.