After Israeli retaliatory airstrikes that have raised fears of a widening Middle East conflict, Vice President Kamala Harris tells Norah O'Donnell her message to Iran: "Do not respond, it would be a mistake. And we are prepared to defend Israel as we have before. We will again." But she adds that "there must be a de-escalation in the region," and the U.S. is working for that "through diplomatic channels and other channels." See more of the interview Monday on @@CBS Mornings and @CBSEveningNews. #news #us #world #israel