Master Sgt. Shane Johnson, 28th Munitions Squadron assistant flight chief, helps clear rocks from the ground at the Rapid City YMCA’s Giraffic Park in Hermosa, S.D., Sept. 1, 2011. Giraffic Park is a site where the YMCA hosts a children’s day camp. (U.S. Air Force photo by Airman 1st Class Kate Thornton/Released)