GRISSOM AIR RESERVE BASE, Ind., -- Members of Air Force ROTC Detachment 220 from Purdue University, West Lafayette, Ind., return to Grissom after an orientation visit to Luke AFB, Ariz. Cadets receive first hand experience of life in the Air Force during their periodic trips to military facilities. (U.S. Air Force Photo/Tech. Sgt. Patrick M. Kuminecz)