Members of the Security Council vote at United Nations headquarters, Monday, July 20, 2015. The U.N. Security Council unanimously endorsed the landmark nuclear deal between Iran and six world powers and adopted a series of measures leading to the end ... more > By - Associated Press - Monday, July 20, 2015 UNITED NATIONS (AP) — The U.N. Security Council has unanimously endorsed the landmark nuclear deal between Iran and six world powers. The resolution, co-sponsored by all 15 council members and adopted Monday morning, also authorizes a series of measures leading to the end of U.N. sanctions that have hurt Iran’s economy. But the measure also provides a mechanism for U.N. sanctions to “snap back” in place if Iran fails to meet its obligations. The resolution had been agreed to by the five veto-wielding council members, who along with Germany negotiated the nuclear deal with Iran.