U.S. President Barack Obama delivers a statement after a  nuclear deal was reached between Iran and six major world powers, beside Vice President Joe Biden, in the East Room of the White House in Washington, July 14, 2015. The nuclear deal between world powers and Iran starts a new phase of intense negotiation - this time between the Obama administration and the U.S. Congress, where some Republicans have long been working to sink an agreement.  REUTERS/Andrew Harnik/Pool
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