Photos: STS-134: Shuttle Endeavour's Final Voyage

Mark Kelly with Gabrielle Giffords

Congresswoman Gabrielle Giffords (right) with her husband, NASA astronaut Mark Kelly.

Crews Move Payload for Endeavour's STS-134 Mission

Crews move the primary payload for space shuttle Endeavour's STS-134 mission into the Payload Changeout Room on Launch Pad 39A at NASA's Kennedy Space Center in Florida.

Shuttle Endeavour Meets Last Fuel Tank

In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, shuttle Endeavour is lowered into place where it is being attached to its external fuel tank and solid rocket boosters, already positioned on the mobile launcher platform. The shuttle is slated to launch its final mission STS-134 in May 2011..

Alpha Magnetic Spectrometer - Artist's Concept

Artist's concept of the Alpha Magnetic Spectrometer, a particle physics detector that will be installed on the starboard truss of the International Space Station.

Endeavour Rolls to Launch Pad

Space shuttle Endeavour begins its slow move from High Bay 3 in the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida.

Endeavour's Shadow Silhouette

The space shuttle Endeavour casts a shadow on NASA's enormous Vehicle Assembly Building as it rolls to the launch pad for its final mission STS-134 on March 10, 2011 at the Kennedy Space Center in Florida. Endeavour is slated to launch on the mission on April 19.

Bright Lights, Big Shuttle

NASA's space shuttle Endeavour heads to the launch pad for its final mission, STS-134, while bathed in bright xenon spotlights on March 10, 2011 at NASA's Kennedy Space Center in Florida. Endeavour will fly its 25th and last mission during the STS-134 flight.

Shuttle Endeavour at Launch Pad 39A

Space shuttle Endeavour stands at Launch Pad 39A near the Atlantic seashore at NASA's Kennedy Space Center in Florida. The shuttle is slated to launch on its final mission, STS-134.

Astronaut Mark Kelly on the Space Shuttle

Astronaut Mark Kelly takes a moment for a photo near the commander's station on the forward flight deck of Space Shuttle Discovery during the STS-124 mission.

Astronaut Double Take: Identical Twins Headed for Space Station

Twin brothers Scott Kelly and Mark Kelly, both NASA astronauts, are set to meet in space next year. Mark will command the last mission of the space shuttle Endeavour, STS-134, while Scott will lead the International Space Station's Expedition 26 mission. Full story.