Barack Obama speaking about Iran's nuclear programme
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Obama welcomes Iran nuclear deal

2 April 2015 Last updated at 20:09 BST

President Obama has welcomed the signing of an outline deal reached on Iran's nuclear programme after marathon talks in Switzerland.

He called it an historic understanding and said it would make the world safer, if, as expected, it led to a comprehensive agreement by the end of June. The deal will limit Iran's nuclear capability in return for the lifting of sanctions against Tehran.

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