A canister, carrying the Alpha Magnetic Spectrometer-2 AMS and Express Logistics Carrier-3 for space shuttle Endeavour's STS-134 mission, is rotated from a horizontal to vertical position in the Canister Rotation Facility at NASA's Kennedy Space Center in Florida. Endeavour and its six-member STS-134 crew are targeted to lift off April 19 at 7:48 p.m. EDT to deliver the payload to the International Space Station. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller