Staff Sgt. George Munoz, 28th Munitions Squadron weapon systems craftsman, pops out of a large box to surprise his son at the Robbinsdale Elementary School library in Rapid City, S.D., Feb. 17, 2012. Munoz wanted to surprise his son after returning home from a year-long assignment. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)