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Former Pennsylvania Sen. Rick Santorum, a Republican presidential candidate, speaks during a town-hall meeting at the Fort Dodge GOP headquarters in Fort Dodge, Iowa, on Tuesday. Mr. Santorum sees "momentum" leading up to the caucuses. (Associated Press)

Former Pennsylvania Sen. Rick Santorum, a Republican presidential candidate, speaks during a town-hall meeting at the Fort Dodge GOP headquarters in Fort Dodge, Iowa, on Tuesday. Mr. Santorum sees "momentum" leading up to the caucuses. (Associated Press)

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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.