Cpl. Thomas A. Trinosky Jr., a combat engineer with Engineer Services Company, Combat Logistics Battalion 25, scribes a line on a slab of drywall during Innovative Readiness Training Dry Tortugas at Dry Tortugas National Park, Fla., Aug. 15, 2016. IRT Dry Tortugas is an Air Force Reserve-led project to provide construction services at the request of the National Park Service. During this year’s iteration, the Marines and Airmen worked together to renovate the crew quarters of Fort Jefferson in Dry Tortugas. (U.S. Marine Corps photo by Sgt. Ian Leones/Released)