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Protesters demonstrating in opposition to the proposed Keystone XL oil pipeline, Monday, March 10, 2014, block the door to the federal building in Philadelphia. The protesters say the pipeline would contribute to global warming. (AP Photo/Matt Rourke)
Photo by: Matt Rourke
Protesters demonstrating in opposition to the proposed Keystone XL oil pipeline, Monday, March 10, 2014, block the door to the federal building in Philadelphia. The protesters say the pipeline would contribute to global warming. (AP Photo/Matt Rourke)

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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.