US and allies clash with Tehran, Moscow at UN Security Council

UNITED NATIONS - The United States and its key European allies clashed with Iran and Russia over Tehran's expanding nuclear program, with the U.S. vowing "to use all means necessary to prevent a nuclear-armed Iran" in a U.N. Security Council meeting Monday.

The U.S., France, Britain and Germany accused Iran of escalating its nuclear activities far beyond limits it agreed to in a 2015 deal aimed at preventing Tehr