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Technical Sgt. Lyle Black and Staff Sgt. Brian Glynn from Selfridge Air National Guard Base, 107th Weather Flight, disassemble their M-4 rifles for cleaning after a day on the shooting range during the annual Gray Wolverine training exercise held at Combat Readiness Training Center Alpena Michigan, July 24, 2011. Black and Glynn regularly disassemble and reassemble their weapons for cleaning to keep them in proper working order. (U.S. Air Force photo by TSgt David Kujawa)
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