dolphins found along the coast since 2010 most had lesions indicating exposure to petroleum compounds. the authors concluded the spill likely drove the mass deaths. developing now syria's state tv acknowledges isis is in full control of the ancient syrian city. with that the terror group controls over half of syria and it is marking its second major advance this week after seizing the key iraqi city on sunday. all of this despite continuing u.s.-led air strikes. richard engel joins us now. when you look at the map around you and how much isis is now in control of you wonder has anything worked specifically these air strikes? >> the air strikes don't seem to be working. they work in certain areas. the air strikes have been working where there are effective partners on the ground. really that is only in one place and that is in the kurdish