whether and how to help turn back the isis advance, which has been alarming. ask anyone, they will suggest so. it does appear the militant's momentum has slowed. as fighters push out of sunni-dominated northern iraq and into the tougher lands, the shia haeartland. my cnn colleague arwa came season in the northern iraqi city off erbil. i'm also joined by retired colonel. and ryan cooper is the national correspondent for the week.com and had some pretty interesting perspective on how all of of this could go down without american shots being fired. get to that in a moment. first, right in country with arwa. let me just get to something that happened today. that was a bombing inside of baghdad, which has alarmed a lot of people, perhaps many baghdad residents not so surprised by that kind of thing.