U.S. Army soldiers from Alpha Company, 1st Battalion, 21st Infantry Regiment, "Gimlets" 2nd Stryker Brigade Combat Team, 25th Infantry Division, practice door breaching techniques with the 66th Engineer Company Sept. 19, 2012, at the Pohakuloa Training Area on Hawaii's Big Island. Soldiers from 1st Battalion, 21st Infantry Regiment, are conducting a month-long exercise which is focused on platoon level collective training with enabler integration. The training will culminate in a combined arms live-fire exercise later this month.