MOUNTAIN HOME AIR FORCE BASE, Idaho -- Senior Airman David Kandziolka, 366th Civil Engineer Squadron, demonstrates how to properly remove his simulated contaminated gas mask to Staff Sgt. Troy Zimmerman, 366th CES, during the "Ability to Survive and Operate Rodeo," Dec. 13. The purpose of the ATSO Rodeo was to increase the critical real-world and Phase II ATSO skills through combined academic and practical stations. (U.S. Air force photo/Senior Airman Angelina Drake)