U.S. Air Force Tech. Sgt. Sean Hanson, a survival, evasion, resistance and escape (SERE) specialist assigned to the 1st Operations Support Squadron explains navigation techniques at Langley Air Force Base, Va., Nov. 19, 2015. A SERE specialist teaches Airmen how to survive in the wilderness on their own. (U.S. Air Force photo by Airman 1st Class Derek Seifert)