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)

U.S. Air Force Capt. Cody Vandegriff, a pilot assigned to the 27th Fighter Squadron, examines a map at Langley Air Force Base, Va., Nov. 19, 2015. Pilots must successfully complete survival, evasion, resistance and escape refresher training every three years to stay current with an array of survival skills. (U.S. Air Force photo by Airman 1st Class Derek Seifert)

U.S. Air Force Tech. Sgt. Sean Hanson, a survival, evasion, resistance and escape (SERE) specialist assigned to the 1st Operations Support Squadron, assists Col. Laura Brodhag, a chief flight surgeon assigned to the 633rd Medical Group, plan a course of direction through wilderness at Langley Air Force Base, Va., Nov. 19, 2015. Brodhag developed a route to a set of coordinates, which tested her navigation skills during a SERE refresher course. (U.S. Air Force photo by Airman 1st Class Derek Seifert)

A U.S. Airman uses a GPS to load coordinates at Langley Air Force Base, Va., Nov. 19, 2015. Being able to use various types of technology during survival courses ensures Airmen are prepared in the event of being stranded in the wilderness. (U.S. Air Force photo by Airman 1st Class Derek Seifert)

U.S. Air Force Tech. Sgt. Sean Hanson, a survival, evasion, resistance and escape specialist assigned to the 1st Operations Support Squadron, discusses hiding gear at Langley Air Force Base, Va., Nov. 19, 2015. Hiding unneeded gear from enemies can help further the distance between the enemy and survivalist. (U.S. Air Force photo by Airman 1st Class Derek Seifert)

U.S. Air Force Tech. Sgt. Sean Hanson, a survival, evasion, resistance and escape (SERE) specialist assigned to the 1st Operations Support Squadron, covers his face with natural camouflage at Langley Air Force Base, Va., Nov. 19, 2015. A SERE specialist is an expert at finding natural camouflage, hiding and escaping hostile environments. (U.S. Air Force photo by Airman 1st Class Derek Seifert)

U.S. Air Force Staff Sgt. Brandon Long, a survival, evasion, resistance and escape (SERE) specialist assigned to the 1st Operations Support Squadron, demonstrates natural camouflage during SERE training at Langley Air Force Base, Va., Nov. 19, 2015. A SERE specialist trains in all major climatic conditions including arctic, desert, tropical, ocean and temperate. (U.S. Air Force photo by Airman 1st Class Derek Seifert)