Staff Sgt. Tina Sampson, 116th Civil Engineering Squadron, Robins Air Force Base, Ga., uses an auto level to get an accurate measurement for construction of a new sidewalk at St. Michaels Association for Special Education, Window Rock, Ariz., June 8, 2011. Sampson, an Engineering Assistant, and more than 40 members of her squadron deployed to the Navajo Nation as part of the Department of Defense Innovative Readiness Training program. (U.S. Air Force photo by Master Sgt. Roger Parsons/Released)