Scott Kelly

Scott Kelly is a former military fighter pilot and test pilot, an engineer, a retired astronaut, and a retired U.S. Navy captain. A veteran of four space flights, Kelly commanded the International Space Station (ISS) on three expeditions and was a member of the yearlong mission to the ISS. In October 2015, he set the record for the total accumulated number of days spent in space, the single longest space mission by an American astronaut. His identical twin brother is Mark Kelly, also a former astronaut.