The final stage of negotiations of P5+1 with Tehran on the Iran's nuclear program can be compared with the most difficult stage of climbing Everest, Russian Deputy Foreign Minister and Russia's chief negotiator, Sergey Ryabkov, said.
"We are working now together with our colleagues on Iran's proposals. This work is difficult and time-consuming. We have missed the deadline on July 7. Those who say that the negotiations are similar to climbing Everest are right - there are last meters of pitons driving into a rock and switching from carabiner to carabiner. This is the hardest thing," he said.
Ryabkov refused to answer the question of when will Russian Foreign Minister Sergei Lavrov return to the talks in Vienna.
