U.S. Army Reserve Staff Sgt. Juan Mercado, a unit safety officer assigned to the 143rd Expeditionary Sustainment Command in Orlando, Florida, conducts a safety briefing at Camp Shelby, Mississippi, June 11, 2026, during Operation Sentinel Justice. Staff Sgt. Mercado serves as a safety representative for Operation Sentinel Justice and railhead operations personnel, ensuring a safe work environment vital to railhead operations and a key component of the exercise. Operation Sentinel Justice (OSJ) 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 Reserve photo by Pfc. Angel Briones, 345th Public Affairs Detachment)
| Date Taken: | 06.11.2026 |
| Date Posted: | 06.14.2026 10:53 |
| Photo ID: | 9748917 |
| VIRIN: | 260611-A-AW412-1001 |
| Resolution: | 1920x1280 |
| Size: | 528.26 KB |
| Location: | CAMP SHELBY, MISSISSIPPI, US |
| Web Views: | 26 |
| Downloads: | 1 |
This work, Railway Operations During OSJ [Image 5 of 5], by PFC Angel Briones, identified by DVIDS, must comply with the restrictions shown on https://www.dvidshub.net/about/copyright.
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