The New START nuclear arms control agreement between the United States and Russia will enter into force after the two nations exchange the instruments of ratification in Munich on Feb. 5, 2011. Here, President Obama signs the US instrument of ratification during an Oval Office ceremony attended by members of his national security team and leading Senators, Feb. 2, 2011. Russian President Dmitry Medvedev signed his country's instrument of ratification on Jan. 28, 2011.
White House photo by Chuck Kennedy
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