Airmen and Marines suit up for training Published Aug. 20, 2010 By Senior Airman Amber Ashcraft 2d Bomb Wing Public Affairs BARKSDALE AIR FORCE BASE, La. -- More than 120 Marines from 1st Battalion 23rd Marines in Bossier City, went through the gas chamber, provided by 2d Civil Engineer Squadron emergency management, Aug. 14 as annual training prior to a deployment. Though the mask is worn into the chamber, members were required to take it off and answer a question asked by the instructors as the tear gas was being released.