In the Vehicle Assembly Building workers observe the external fuel tank as it is lifted.

In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, workers observe the external fuel tank, ET-122, for space shuttle Endeavour's STS-134 mission, as it is lifted from its test cell. When lowered in place, the tank will be attached to the solid rocket boosters on the mobile launcher platform. Endeavour and its crew will deliver the Express Logistics Carrier-3 and the Alpha Magnetic Spectrometer to the International Space Station. Launch is targeted for April 19. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller