Army Reserve Spc. Ricardo Manriquez (right), a communication specialist and native of Sylmar, California, assigned to the 307th Chemical Company, 453rd Chemical Battalion, 209th Regional Support Group, 76th Operational Response Command links blank .50 caliber ammunition together in the back of a vehicle at Fort Riley, Kansas, April 4, as Spc. James Cadaoas, a chemical, biological, radiological and nuclear (CBRN) specialist and native of Carson, California, also assigned to the 307th Chem. Co, supervises. More than 450 Army Reserve Soldiers from around the country are participating in a three-week gunnery exercise here entitled Operation Gauntlet, which is designed to hone crucial gunnery skills and increase battlefield lethality. (Official U.S. Army Reserve photo by Sgt. 1st Class Brent C. Powell)