now, let's look at question number five. after eight years of war and 4500 u.s. combat deaths in iraq, it's easy to see why some americans are not eager to go back. maybe you think not our problem or to put it even bolder, why should the united states care? let's bring in eli lake, senior national security correspondent for the daily beast. also terrorism expert robert mcfadden and former special agent with the naval criminal investigative service. thank you to both of you again. eli, let's start with you. can you make a case for why americans should care if iraq is consumed by sectarian civil war that some are calling it? >> well, i think there's a couple cases you can make. the first and most obvious one is that the lesson of the pre- 9/11 years is when fanatic barbarians like isis get a sort of safe haven they're able to plot attacks on western europe and other places so one of the prime objectives of the