isis. the assault on the ice sill-controlled city of tikrit, finally broke the isis defensive lines. that was yesterday. now racki security forces and shiite militias are making a rapid push. they have regained pricely artifacts, this time in the ancient city of coursebad. an american is recruiting other americans to do the same. first i'm joined by bill kneely who was in the city of erbil in iraq. bill, give us a sense of what's happening on the battlefront there. >> yes, chris. what we do know is that iraqi forces have broken through the suburbs of tikrit and they're heading towards the center. really beyond that it's very contentious, and we don't know. some of what the iraqi government forces are saying really is just fantasy. one militia leader saying 75% of