Technicians check the channel around the circumference of the left forward center solid rocket booster segment for dirt and debris before processing continues.

In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, technicians check the channel around the circumference of the left forward center solid rocket booster segment for dirt and debris before processing continues.

The booster along with its twin will be stacked on the mobile launcher platform along with an external fuel tank awaiting the arrival of space shuttle Endeavour for its flight to the International Space Station. 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/Kim Shiflett