Answer
Kelly commanded three space missions before 2011. These included STS-103 in 1999, STS-116 in 2006, and STS-124 in 2008. During her career, Kelly spent more than 500 hours in space, including more than 38 hours on six spacewalks. She also served as the commander of the International Space Station (ISS) from November 2010 to March 2011.