Biological detection systems create safety for Army Reserve Soldiers
U.S. Army Reserve 2nd Lt. Justin Kelleher, assigned to the 307th Chemical Company, talks to Pfc. Daniel Flores, a chemical, biological, radiological, and nuclear specialist assigned to the 307th Chemical Company, during Operation Sentinel Justice at Camp Shelby, Miss., June 15, 2026. Operation Sentinel Justice is a large-scale U.S. Army Reserve training exercise that enhances Soldier and unit readiness, validates capabilities, and improves mission effectiveness through realistic, multi-echelon training in a dynamic operational environment. (U.S. Army photo by Sgt. Xavier Chavez)