Army Sgt. Joshua Critchfield, kneeling, applies a tourniquet to the leg of Spc. Cory Stearns during Operation Lethal Warrior at Fort McCoy, Wis., Aug. 10, 2018. Critchfield and Stearns are assigned to the 901st Minimal Care Detachment. The exercise re-enforces soldiers training on land navigation and maneuvering techniques, operating a radio, first aid, and reacting to a chemical or biological attack. Army Reserve photo by Spc. John Russell