UNITED NATIONS (AP) — U.S. Secretary of State Rex Tillerson appealed to the international community, especially Russia and China, to stop the spread of nuclear weapons, calling North Korea a case study of the failure to prevent rogue states from obtaining weapons of mass destruction.

UNITED NATIONS (AP) — The Latest on the U.N. General Assembly (all times local):

11:45 p.m.

The United States is calling a ministerial meeting of the U.N. Security Council on Thursday afternoon on "the acute threat" posed by the proliferation of nuclear, chemical and biological weapons and their delivery systems.