gurella tactics. right now, they are hoping these air strikes can be sufficient enough but any land scale operation will incur heavy casualties. that is something different arab capitals have to be ready to explain why forces are there. ian lee in cairo, thank you. turning to iraq a u.s.-led coalition staged 17 targets in tikrit overnight. until now, iranian backed shi ite militias were leading the forces. they are threatening to attack americans. let s bring in jomana karadsheh live from baghdad. complicated, jomana. reporter: it is a very complicated situation,