Spc. Jyrmarqus L. Hearn, a signal support systems specialist assigned to Company C, 150th Engineer Battalion, 155th Armored Brigade Combat Team, feels the burn after a chemical protective mask confidence exercise at Camp Shelby Joint Forces Training Center, Miss., Feb. 15, 2018. The 155th ABCT is preparing for an upcoming deployment to the Middle East in support of Operation Spartan Shield. ( Army National Guard photo by Spc. Jovi Prevot)

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Keywords: 155th, abct, armored, army, brigade, camp, chamber, chemical, combat, corps, gas, guard, mississippi, msng, national, operation, shelby, shield, spartan, team