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Wolf Blitzer
Differences on foreign threats emerge in GOP debate
Differences on foreign threats emerge in GOP debate

Republican presidential contenders jousted over Pakistan, Afghanistan and the Middle East on Tuesday night in a tense national security debate that laid out sharply contrasting views on how to keep America safe from attack. Candidates raised the specter of terrorists striking U.S. cities with nuclear bombs as they sought to gain an edge, with Pakistan emerging once again as a key source of disagreement among the White House hopefuls. Texas Gov. Rick Perry took a firm stand on U.S. financial aid to Pakistan, questioning the value of supporting a nuclear-armed nation that he said had not proved to be a reliable friend. Nations that have been hostile to the United States should "not...

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