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Technical Sgt. Laurance Isaac, 436th Security Forces Squadron, pats down Staff Sgt. Che Mason, 436th Aerial Port Squadron, who is playing the role of a robber during a simulated armed-robbery at building 520, Dover Air Force Base, Del. on August 12, 2013. The simulated armed robbery is one of many scenarios taking place as part of a Major Accident Response Exercise from August 12-14. (U.S. Air Force photo/Greg L. Davis)

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An exercise evaluator watches Staff Sgt. Che Mason, (foreground) of the 436th Aerial Port Squadron, as he is held by Senior Airman Sean Shields, 436th Security Forces Squadron after being apprehended following a simulated armed-robbery at building 520, Dover Air Force Base, Del. on August 12, 2013. The purpose of a MARE is to evaluate the local first responder’s ability to respond to a myriad of domestic situations and scenarios. (U.S. Air Force photo/Greg L. Davis)

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Staff Sgt. Che Mason, (foreground) of the 436th Aerial Port Squadron, leans against a sign post while being held by Senior Airman Sean Shields, 436th Security Forces Squadron, after being taken in to custody during a Major Accident Response Exercise, August 12, 2013, Dover Air Force Base, Del. Mason played the role of an armed-robber during a simulated test of security and response times by the Security forces personnel as part of the MARE. (U.S. Air Force photo/Greg L. Davis)