America's space shuttle program came one step closer to it's end Wednesday morning with the landing of shuttle Endeavour at Kennedy Space Center at 2:35am EST, having successfully completed a 16 day mission to deliver the final major component the International Space Station.

Mark Kelly commanded the flight and was joined by Pilot Greg H. Johnson and Mission Specialists Mike Fincke, Drew Feustel, Greg Chamitoff and the European Space Agency's Roberto Vittori. Endeavour delivered the Alpha Magnetic Spectrometer-2 (AMS), beginning a scientific voyage of discovery to our solar system and beyond from the International Space Station. By measuring cosmic rays, AMS is designed to help researchers understand the origin of the universe and search for evidence of dark matter, strange matter and antimatter.