Staff Sgt. Aaron Walker, 28th Civil Engineer Squadron water and fuels systems technician, disassembles lockers at the Black Hills Habitat for Humanity ReStore during the United Way of the Black Hills Day of Caring in Rapid City, S.D., Sept. 5, 2013. Airmen volunteered their time to support more than 60 local organizations including Habitat for Humanity, the Club for Boys, and the Rapid City YMCA. (U.S. Air Force photo by Airman 1st Class Rebecca Imwalle/Released)