Secretary of State Hillary Clinton and Russian Foreign Minister Sergei Lavrov exchanged the instruments of ratification for the New START nuclear arms control agreement during the Munich Security Conference in Munich, Germany, Feb. 5, 2011. With this exchange, the treaty, which reduces US and Russian strategic nuclear forces to unprecedented levels, entered force. Here, a B-52 bomber, a component of the US strategic nuclear triad, soars through the sky during a nuclear operational readiness exercise at Minot AFB, N.D., Nov. 5, 2009.
Air Force photo by A1C Jesse Lopez
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