MOSCOW (Dispatches) -- Russian Foreign Minister Sergei Lavrov on Friday commended “significant progress” made in the Vienna talks aimed at reviving the Iranian nuclear deal. “If the United States unilaterally withdrew from the agreement and thereby violated the UN Security Council Resolution [2231] in a gross manner, then, probably, the U.S. return to the JCPOA presupposes a complete and unconditional renewal of all obligations.” He also said, “Our Western partners are trying in every possible way to use this situation in order to retroactively change the JCPOA and impose new obligations on Iran.”