US President Barak Obama is facing a lot of challenges after the historical agreement reached on 2 April 2015 between Iran and the p5+1 group of international mediators, on Tehran's nuclear programme after marathon talks in Switzerland. The mediators, including China, France, Germany, Russia, the UK, and the US, agreed with Iran on a number of key issues that had previously obstructed the deal. In exchange for lifting sanctions imposed by the US and the EU, Iran agreed to limit its uranium enrichment capacity to ensure that its nuclear goals are purely peaceful.
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