NewsNation host Chris Cuomo and his frequent guest, Bill O’Reilly, went head-to-head on Wednesday night (April 8) in a heated exchange about Iran’s nuclear capabilities. And it ended with Cuomo telling the Fox News veteran: “Be a man. Don’t be a big mouth.”

The pair were discussing comments from Secretary of Defense Pete Hegseth and International Atomic Energy Agency (IAEA) Director General Rafael Grossi relating to Iran’s uranium enrichment. Hegseth said in a press conference on Wednesday that the U.S. knew the full extent of Iran’s nuclear operations.

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