Selected as an astronaut candidate by NASA in December 1994, Melroy reported to the Johnson Space Center in March 1995.
Melroy served as pilot on two flights (STS-92 in 2000 and STS-112 in 2002), and was the mission commander on STS-120 in 2007, making her the second woman to command a space shuttle mission (after Eileen Collins) [REF].