Space Shuttle Endeavour is one of the orbiters of the Space Shuttle program of NASA, the space agency of the United States. Endeavour was the fifth and final spaceworthy NASA space shuttle to be built, and first flew in May 1992 on mission STS-49 with its last mission being STS-134 in May 2011. The STS-134 mission was originally planned as the final mission of the Space Shuttle program, but with authorization of the STS-135 mission, Atlantis became the last Space Shuttle to fly. Beatifically illustrated with the Alpha Magnetic Spectrometer on 100% cotton Youth T-Shirt