Significance Of Iran's Cultural Sites; Facebook Bans Deepfakes

Trump's warned of bombing Iranian cultural sites, though U.S. Defense Secretary Mark Esper says the U.S. military does not plan to do so. We talk with a professor of Islamic Art and Architecture at Yale University about the significance of these historic sites. Also, Facebook says it's banning deepfakes, or videos manipulated with the intention to mislead. The move has already drawn criticism for not going far enough to combat the spread of disinformation.