Endeavour (OV-105) was the fifth and final Shuttle built. It embarked on its first mission, STS-49, in May 1992 and its 25th and final mission, STS-134, in May 2011. NASA chose, on cost grounds, to build much of Endeavour from spare parts rather than refitting the Space Shuttle Enterprise. After more than twenty organizations submitted proposals to NASA for the display of an orbiter, NASA announced that Endeavour would go to the California Science Center in Los Angeles. The exhibit was opened on October 30, 2012, at the temporary Samuel Oschin Space Shuttle Endeavour Display Pavilion.