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A photo made from NASA video shows Endeavour over the western Pacific as it approaches the International Space Station Wednesday May 18, 2011 on the penultimate voyage of the space shuttle program. It is carrying a particle physics detector for the station. (AP Photo/NASA)

A photo made from NASA video shows Endeavour over the western Pacific as it approaches the International Space Station Wednesday May 18, 2011 on the penultimate voyage of the space shuttle program. It is carrying a particle physics detector for the station.

Endeavour's final launch

January 1, 1970

Second-to-last NASA shuttle blasts off.