A U.S. Army Stryker armored vehicle from the 4th Battalion, 23rd Infantry Regiment, framed by concertina wire, departs Forward Operating Base Wolverine in Zabul province, Afghanistan, Dec. 4, 2009. The Army uses the Stryker in everyday operations because of its combination of maneuverability and firepower. (U.S. Air Force photo by Tech. Sgt. Efren Lopez/Released)
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