What's behind Trump's decision to not strike Iran?
President Trump ordered a military strike on Iran, then called it off, in a move that one CBS News source describes as "cold feet." The attack would have been retaliation for Iran's downing of a U.S. surveillance drone. CBS New foreign affairs correspondent and "Face the Nation" moderator Margaret Brennan joins "CBS This Morning" from Washington to discuss what European allies are saying about President Trump's decision, what might have contributed to his reversal and the likelihood that Iran will come to the table for negotiations with the U.S.