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Former U.S. vice president and president candidate, Al Gore, right, shakes hands with UN climate head, Yvo de Boer, before speaking, at the Climate Summit, in Copenhagen Tuesday, Dec. 15, 2009. (AP Photo/Tariq Mikkel Khan/Polfoto)
Photo by: KHAN TARIQ MIKKEL
Former U.S. vice president and president candidate, Al Gore, right, shakes hands with UN climate head, Yvo de Boer, before speaking, at the Climate Summit, in Copenhagen Tuesday, Dec. 15, 2009. (AP Photo/Tariq Mikkel Khan/Polfoto)

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Best combat rifles of all time

A combat rifle is a military service rifle that fires a full-power rifle cartridge, a mainstay of every modern army in the world. See the best combat rifles ever made.