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Staff Sgt. Zachary Petroelje, 386th Expeditionary Maintenance Squadron conventional munitions maintenance supervisor, competes in the 500-meter free-style July 4, 2010, at a base in southwest Asia. Sergeant Petroelje beat out four other swimmers to win. The event was part of Independence Day celebrations that included a variety of games for Airmen assigned to the 386th Air Expeditionary Wing. (U.S. Air Force photo by Senior Airman Laura Turner)
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