U.S. President Barack Obama has strongly defended a historic nuclear deal with Iran, saying the alternative was to clear the way for Iran to become a nuclear power.
At a news conference in Washington, the president called on Congress- where there is stiff opposition to dismantling sanctions against Iran- to support the deal.
His comments come a day after the U.S. and five other world powers struck the agreement with Tehran.
From Washington, Nina-Maria Potts reports:
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