Iran and six world powers are close to a nuclear agreement and are expected to iron out most of their remaining differences by the weekend, but another round of talks likely will be needed to seal any deal, a senior Russian official said March 20.
Associated Press: Russian official says Iran talks close to deal but not yet there
Iran's nuclear programme chief Ali Akbar Salehi (L) and Rosatom Director General Sergey Kirienko signing an agreement in Moscow on Nov. 11, 2014.
