Phase II Chemical Warfare Exercise
                U.S. Air Force Airman 1st Class Ian Bollinger, a crew chief assigned to the 175th Aircraft Maintenance Squadron, Maryland Air National Guard, assists U.S. Air Force Staff Sgt. Noah Thomas, a crew chief assigned to the 175th Aircraft Maintenance Squadron, Maryland Air National Guard, with donning his protective mask during a simulated chemical attack at Warfield Air National Guard Base, Baltimore, Md. on April 5, 2014. (U.S. Air National Guard photo by Tech. Sgt. Christopher Schepers/RELEASED)
                
                    
                        PHOTO BY:
                        Tech. Sgt. Christopher SchepersRELEASED
                    
                    
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                        140405-Z-PA115-081.JPG
                    
                    
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