 The mission was the 30th flight of Space Shuttle "Atlantis" and also the first by "Atlantis" in over 14 years not to visit a space station, the last one being STS-66.The fifth servicing mission to Hubble, HST-SM4, was originally scheduled to launch in late 2005 or early 2006.On 16 January 2004, then-NASA Administrator Sean O'Keefe canceled the mission, as well as any future missions to Hubble, citing safety constraints imposed by the "Columbia" Accident Investigation Board.