Space Shuttle Endeavour

Space Shuttle Endeavour (Orbiter Vehicle Designation: OV-105) is one of three currently operational orbiters in the Space Shuttle fleet of NASA, the space agency of the United States. (The other two are Discovery and Atlantis.) Endeavour is the fifth and final spaceworthy NASA space shuttle to be built, constructed as a replacement for Challenger. Endeavour first flew in May 1992 on mission STS-49 and is scheduled for decommissioning in 2010.