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Sen. Van Hollen: 'We have to get back on the world stage'

06:33

Following President Biden's remarks at the Munich security conference, Senator Chris Van Hollen (D-MD) joins Andrea Mitchell to talk about the U.S.' reemergence on the world stage. "We're back to engage Iran to prevent Iran from developing a nuclear weapon," he says. "And we're back in terms of asserting American leadership on climate change."