Lt. Col. Christopher Shea, left, and Tech. Sgt. Geoffry Eastepp, 571st Mobility Support Advisory Squadron air advisors, attempt to ignite tinder for a fire-building exercise during the squadron’s field training exercise Aug. 10, 2020, at King Range National Conservation Area near Shelter Cove, Calif. During the exercise, all students had to prove that they could ignite tinder before moving onto shelter building. (U.S. Air Force photo by Tech. Sgt. David W. Carbajal)