Combat engineers from the 91st Engineer Battalion, 1st Armored Brigade Combat Team, fire a Mine Clearing Line Charge Aug. 15 at the Crittenberger Multi-Purpose Range Complex at Fort Hood, detonating more than 1,500 pounds of C4 explosives. The breaching operation was part of Ironhorse Challenge, a 16-day combined arms live-fire maneuver and coordination exercise. (Photo by Staff Sgt. Keith Anderson, 1st Armored Brigade Combat Team Public Affairs, 1st Cavalry Division)

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