250 air strikes against isis by the u.s.-led coalition within the last month. peshmerga says they are going against 600 isis fighters in sinjar. there are landmines and booby traps that make it difficult. we have cnn's nick paton walsh with the peshmerga with the latest. >> reporter: i have just entered the city and it is remarkable devastation. the coalition air strikes and the booby traps are literally everywhere you walk. heavy gunfire when we were inside. peshmerga, we saw about three hours ago a different issue on foot. heavy gunfire as we came across pockets of isis.