U.S. Marine Corps Sgt. Sean Nash, a rifleman with 1st Marine Division, provides cover fire while wearing the Plate Carrier Generation III during the Integrated Training Exercise at Marine Air Ground Combat Center Twentynine Palms, California, Jan. 28, 2020. Developed by Marine Corps Systems Command, the PC Gen. III is a lightweight body armor system comprising protective plates to guard against bullets and fragmentation. (U.S. Marine Corps photo by Cpl. Jack C. Howell)