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

Astronaut Barry "Butch" Wilmore is leaving NASA after a quarter-century of service. Wilmore spent a total of 464 days off Earth during his three spaceflights.

The astronaut is stepping away from NASA shortly after returning from a troubled test flight that left him aboard the ISS months longer than expected.