Steven Roy Swanson is an American engineer and retired NASA astronaut. Swanson has flown two shuttle flights, STS-117 and STS-119, and one Soyuz flight, TMA-12M. All of the flights were to the International Space Station. He has logged over 195 days in space and completed five spacewalks totaling 28 hours and 5 minutes. Swanson has served in other roles at NASA, such as a CAPCOM for both International Space Station and Space Shuttle missions. His awards and honors include the NASA Exceptional Achievement Medal and the JSC Certificate of Accommodation. Prior to becoming a NASA astronaut, Swanson worked for GTE in Phoenix, Arizona, as a software engineer. He is married and has three children.

STS-117 was a Space Shuttle mission flown by Space Shuttle Atlantis, launched from pad 39A of the Kennedy Space Center on June 8, 2007. Atlantis lifted off from the launch pad at 19:38 EDT. Damage from a hail storm on February 26, 2007, had previously caused the launch to be postponed from an originally-planned launch date of March 15, 2007. The launch of STS-117 marked the 250th orbital human spaceflight. It was also the heaviest flight of the Space Shuttle.