Colombia president calls troops to patrol capital

Associated Press
Colombia president calls troops to patrol capital

Riot police stand in the capital's main square during clashing with students in downtown Bogota, Colombia, Thursday, Aug. 29, 2013. Students are protesting in support of farmers who demand lower fertilizer prices, complain of being undercut by cheap imports from near and far of products including potatoes, onions and milk, and say their sector is being hurt by free trade and other agreements promoted by the government. (AP Photo/Fernando Vergara)

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