NASA announced its 2021 Astronaut Candidate Class on Dec. 6, 2021. The 10 candidates, pictured here at NASA’s Johnson Space Center in Houston are: U.S. Air Force Maj. Nichole Ayers, Christopher Williams, U.S. Marine Corps Maj. (retired.) Luke Delaney, U.S. Navy Lt. Cmdr. Jessica Wittner, U.S. Air Force Lt. Col. Anil Menon, U.S. Air Force Maj. Marcos Berríos, U.S. Navy Cmdr. Jack Hathaway, Christina Birch, U.S. Navy Lt. Deniz Burnham, and Andre Douglas. Credits: NASA