In the Rotation, Processing and Surge Facility, or RSPF, a worker conducts propellant grain inspection of the solid rocket booster segment required as part of safety analysis. The booster segment will be stacked with others to be used on Space Shuttle Atlantis on mission STS-122 targeted for December. The mission will continue assembly of the International Space Station, delivering and installing the Columbus Laboratory. Photo credit: NASA/George Shelton