U.S Air Force Tech. Sgt. Sean Eline, an electrician with the 442d Civil Engineer Squadron at Whiteman Air Force Base, Mo., adds support for the handrails on the defensive fighting position as part of training at Cannon Range, Mo., Sept. 12, 2019. The DFP allows Airmen to sit or lay in fighting positions while surveying the site during a combat environment. (U.S. Air Force photo by Senior Airman Taylor Davis)