Russian Foreign Minister Sergey Lavrov, right, welcomes his Iranian counterpart, Mohammad Javad Zarif, in Moscow on Monday, Aug. 17, 2015. The two held talks on implementation of the nuclear deal and on international efforts to mediate the conflict in Syria.
Russian Foreign Minister Sergey Lavrov, right, welcomes his Iranian counterpart, Mohammad Javad Zarif, in Moscow on Monday, Aug. 17, 2015. The two held talks on implementation of the nuclear deal and on international efforts to mediate the conflict in Syria. Ivan Sekretarev AP
Russian Foreign Minister Sergey Lavrov, right, welcomes his Iranian counterpart, Mohammad Javad Zarif, in Moscow on Monday, Aug. 17, 2015. The two held talks on implementation of the nuclear deal and on international efforts to mediate the conflict in Syria. Ivan Sekretarev AP