Iran shooting down U.S. drone is "another step up the escalatory ladder" CBS News senior national security contributor and former acting CIA director Michael Morell joins “CBS This Morning” to discuss Iran’s recent announcement that it shot down an American drone. Morell explains that the drone was monitoring the Iranian Navy at the time of the attack, which he describes as “another step up the escalatory ladder” in tensions between the two nations. He also stressed that the U.S. and its allies must work together to stop the conflict from escalating further.