Mark Edward Kelly is an American astronaut, engineer, and former U.S. Navy captain. The husband of former U.S. Representative Gabby Giffords, he is the author of multiple books and an aerospace executive and consultant. He is a Democratic candidate in the 2020 United States Senate special election in Arizona.
A naval aviator, Kelly flew combat missions during the Gulf War. He was selected to become a NASA Space Shuttle pilot in 1996 and flew his first mission in 2001 as pilot of STS-108. He piloted STS-121 in 2006 and commanded STS-124 in 2008 and STS-134 in 2011. STS-134 was his final mission and the final mission of Space Shuttle Endeavour.
Giffords was shot in an attempted assassination in Tucson, Arizona, on January 8, 2011, suffering serious injury to her brain. After the shooting, in which six people were killed, she and Kelly were thrust into the media spotlight.
Kelly's identical twin, Scott Kelly, is also an astronaut. The Kelly brothers are the only siblings to have both traveled in space. In 2015, Scott Kelly began a mission in space on the International Space Station. He returned to Earth on March 1, 2016, after 340 days in space.