Airman 1st Class Nathan Aviles, 33rd Fighter Wing client service technician, commmunicates over the radio March 27, at Eglin Air Force Base, Fla. The Ability To Survive and Operate evaluation gave Airmen the opportunity to exercise their knowledge in responding to chemical, biological, radiological and nuclear threats and self aid buddy care situations. (U.S. Air Force photo by Airman 1st Class Emily Smallwood)