NASA's space shuttle "Endeavour" returns home to Runway 15 at the Kennedy Space Center at 2:35 am on June 1, 2011. Endeavour is completing its twenty fifth and final mission, STS 134, for NASA's shuttle program. Endeavour and her six person crew flew to the International Space Station, dropping off supplies as well as the Alpha Magnetic Spectrometer during its sixteen day mission. .UPI/Joe Marino-Bill Cantrell