Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Trump Ratchets Up Verbal Attacks on Iran Steve Herman VOA's Capitol Hill correspondent Michael Bowman and VOA Persian's Afshar Sigarchi contributed to this report. Top U.S. and Iranian officials are continuing to fire verbal warning shots at each other while insisting they want to avoid war. Iranian Supreme Leader Ayatollah Ali Khamenei on Wednesday called the United States the "world's most vicious regime" and a "source of wars, conflict and plunder." .