At U.N., U.S. urges Russia to tone down 'dangerous' nuclear rhetoric

U.N. Security Council votes on calling special General Assembly session

UNITED NATIONS (Reuters) - U.S. Ambassador to the United Nations Linda Thomas-Greenfield urged Russia on Sunday to tone down its "dangerous rhetoric regarding nuclear weapons."

"This is another escalatory and unnecessary step that threatens us all," she told a meeting of the U.N. Security Council.

(Reporting by Michelle Nichols; Editing by Richard Chang)