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NATO Chief Says Alliance Important To Europe And United States

NATO Secretary General Jens Stoltenberg says the alliance's security pact is not only important for Europe, but the United States as well. Asked for his response to the election of Donald Trump as U.S. president, Stoltenberg recalled that NATO had only invoked its collective security principle, known as Article 5, once -- after the militant attacks on the U.S. on September 11, 2001. Trump repeatedly questioned America's commitment to NATO during his campaign for president. (AP Video)