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Master Sgt. Ethan Boyd fires an M-4 round during the annual Gray Wolverine training exercise with the107th Weather Flight group at Combat Readiness Training Center Alpena Michigan on July 19, 2011. Boyd is the first sergeant for the unit and annually qualifies with the M-4 rifle at the Gray Wolverine training camp. (U.S. Air Force photo by TSgt David Kujawa)
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