High Quality Content by WIKIPEDIA articles! The retirement of NASA`s Space Shuttle fleet took place from March to July 2011. Discovery was the first of the three active space shuttles to be retired, completing its final mission on March 9, 2011; Space Shuttle Endeavour did so on June 1. The final shuttle mission was completed with the landing of Atlantis on July 21, 2011, bringing about the end of the 30-year Space Shuttle program.