U.S. Air Force 1st Lt. Manuel Lamson, 9th Expeditionary Bomb Squadron weapon systems officer, gathers dried palm frond during a jungle survival course July 27, 2017, at Andersen Air Force Base, Guam. During the course, Airmen were trained on how to build fires, identify edible plants and animals, erect shelters and how to contact friendly forces while isolated. (U.S. Air Force photo by Airman 1st Class Christopher Quail)