Iran threatens to block nuclear inspectors if U.S. does not lift sanctions

The Iranian government says it will block United Nations nuclear watchdog inspectors if the U.S. does not lift sanctions on the country by February 21st. CBS News senior foreign affairs correspondent and "Face the Nation" moderator Margaret Brennan joins "Red and Blue" anchor Elaine Quijano with more on impending talks and Defense Secretary Lloyd Austin's debut meeting with NATO allies.

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