Workers prepare space shuttle Endeavour for its move or rollover from its hangar to the Vehicle Assembly Building.

In Orbiter Processing Facility-2 at NASA’s Kennedy Space Center in Florida, workers prepare space shuttle Endeavour for its move, or "rollover," from its hangar to the Vehicle Assembly Building.

Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, spare parts, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller