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.

Four months after NASA astronauts Butch Wilmore and Suni Williams returned from their eight-day turned nine-month mission in space, Butch has retired.