Iran and world powers are struggling to overcome deep divisions on two core sticking points in talks on a possible nuclear deal: reimposing U.N. sanctions if the Iranians violate the agreement and how Tehran can buy atomic technology, envoys said.
Reuters: US aims to make Iran nuclear deal immune to Russian, Chinese veto
Russian Foreign Minister Sergei Lavrov (C) walks in the Beau Rivage Palace Hotel in Lausanne, Switzerland, on March 31, 2015, during negotiations on Iran's nuclear programme.
