We're saddened to learn about the passing of Michael “Rich” Clifford. Selected as one of our @NASA_Astronauts in 1990, he flew 3 space shuttle missions in 7 years, spending a total of 665 hours in space. Our thoughts are with his family.
— NASA's Johnson Space Center (@NASA_Johnson) December 29, 2021
About Clifford: https://t.co/wOfdCDZpZM. pic.twitter.com/jCgFJOGdNA
