U.S. Army Master Sgt. Todd Fetzer, 1st Special Forces Command (Airborne), Ft. Bragg, N.C., watches GORUCK participants press their rucksack during warm-up exercises Oct. 6, 2017, at Brecknock Park in Camden, Del. Twenty-nine individuals completed the 2017 GORUCK Light Challenge. (U.S. Air Force photo by Roland Balik)