Wilmore, 62, had already retired from the Navy. Williams, 59, also a retired Navy captain, is still with NASA. She joined Second Lady Usha Vance at Johnson Space Center in Houston earlier this week, taking part in a summer reading challenge for schoolchildren.

One of NASA's two previously stuck astronauts has retired from the space agency, less than five months after his unexpectedly long spaceflight came to an end. NASA announced Butch Wilmore's departure on Wednesday.