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.

Three space station crew members packed up for a fiery return to Earth Thursday, wrapping up a nearly 200-day mission that was extended one month at the last minute because of a Russian rocket failure in April that threw a wrench into the lab’s crew rotation schedule.

A SpaceX Dragon capsule is wrapping up a month-long mission Saturday. The spaceship departed the International Space Station at 9:23 a.m. EDT (1323 GMT), and splashed down in the Pacific Ocean at approximately 3 p.m. EDT (1900 GMT) with nearly two tons of experiment specimens and hardware, including a habitat of mice and Robonaut 2, an experimental humanoid robot in need of repairs.