Facility 2 thermal protection system technicians work on replacing some of space shuttle Endeavour's heat shield tiles.

In Orbiter Processing Facility-2 at NASA's Kennedy Space Center in Florida, thermal protection system technicians work on replacing some of space shuttle Endeavour's heat shield tiles.

As the final planned mission of the Space Shuttle Program, Endeavour and its crew will deliver the Alpha Magnetic Spectrometer, as well as critical spare components to the station on the STS-134 mission targeted for launch Feb. 26, 2011. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Frankie Martin