STS-26 was the 26th NASA Space Shuttle mission and the seventh flight of the Discovery orbiter. The mission launched from Kennedy Space Center, Florida, on 29 September 1988, and landed four days later on 3 October. STS-26 was declared the "Return to Flight" mission, being the first mission after the Space Shuttle Challenger disaster of 28 January 1986. It was the first mission since STS-9 to use the original STS numbering system, and the first to have all its crew members wearing pressure suits for launch and landing since STS-4. STS-26 was also the first all-veteran crew mission since Apollo 11, with all of its crew members having flown at least one prior mission.