inside of kobani and captured these scenes. a key question. after three months of air strikes by the u.s. and its allies why hasn't isis been driven out of kobani? >> the air strikes came too late. this allowed the islamic state to get in the city. once you have fighters inside of a city it is hard for air power dig them out. if they can hide, even if the building doesn't provide any protection, it provides concealment. >> reporter: the air strikes have impacted the ability of sigh sis to move around kobani. the official says isis tanks and other vehicles can no longer roam free and warns it is too soonl soon to judge the military strategy. isis' propaganda campaign isn't slowing down. in another video, it shows iraqi soldiers deserting their positions. running away from isis forces. there are new still photos