JOINT BASE ANDREWS, Md. -- Tech. Sgt. Chris McAlister, 459th Aircraft Maintenance Squadron Exercise and Evaluation Team member, shows 459th Air Refueling Wing Airmen how to ensure there is an airtight seal on their gas masks during a mobility and readiness exercise Feb. 5 here. Along with knowing the proper wear of gas masks, 459 ARW Reservists also trained in other scenarios like understanding alarm signals and donning Chemical Protective Overgarments during exercise Vantage Rally/Tiger Claw 11-01. The three-day exercise prepared the wing for an upcoming Operational Readiness Inspection scheduled for 2012. (U.S. Air Force photo/Tech. Sgt. Steve Lewis)