Face the Nation on the Radio 12/27

On this week's "Face the Nation," moderator Margaret Brennan talks to Nashville Mayor, John Cooper and the former Assistant Director of the FBI's Counterintelligence Unit, about the explosion that rocked the city on Christmas Day. As always, we'll hear from former FDA Commissioner Dr. Scott Gottlieb for the latest on COVID-19. Plus Per tradition, we talk to some of the authors, whose books have been named "some of the year's best."