GRISSOM AIR RESERVE BASE, Ind., -- Captain Tim McMahon, firefighter, uses his computer to pass the time while working the evening shift at the Grissom fire house. Firefighters work a shift of 48 hours on and 72 hours off and do a variety of activities to pass the time between emergency runs. (U. S. Air Force photo/Tech. Sgt. Patrick Kuminecz)
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