Richard Alter, foreground, the assistant fire chief with the U.S. Air Force's 375th Civil Engineer Squadron, and Master Sgt. Michael Reeves, with the 375th Security Forces, look at the map during a simulated chlorine spill exercise July 24, 2014, at Scott Air Force Base, Ill. (U.S. Air Force photo by Senior Airman Tristin English/Released)
<br>Unit: Defense Imagery Management Operations Center
Senior Airman Tristin English
Taken on 24 July 2014
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