The supreme leader of Iran has issued a new threat to the U.S. amid stalled negotiations to end the regime's nuclear program. #fox #media #breakingnews #us #usa #new #news #breaking #foxnews #iran #military #defense #war #politics #political #politicalnews #government #nuclear #weapons #middleeast #global #security #diplomacy #threat Don’t just watch Fox News—be part of it. Become a Fox News Patriot today. https://youtube.com/foxnews/join Subscribe to Fox News: https://bit.ly/2vBUvAS Watch more