Children of base Airmen do push-ups for a physical training demonstration during Kids, Spouses and Teachers Understanding Deployment Operations event March 13, 2010, at Ellsworth Air Force Base, S.D. Senior Airman Zachary Christy, 28th Force Support Squadron food services specialist, teaches the children how to do a proper push-up. (U.S. Air Force photo/Airman 1st Class Anthony Sanchelli)