Captain Mark KellyDr. Mark Edward Kelly (born February 21, 1964, in Orange, New Jersey) is an American astronaut. He first went into space as the pilot for STS-108 Endeavour December 5–17, 2001. He returned to space as the pilot of STS-121 Discovery July 4-17, 2006. On Kelly's third mission he served as commander of STS-124 Discovery May 31 to June 14, 2008.