one of the things i think that was key to this is they were talking about that this whole business of surrounding them is really meant to keep them from going back home. and so when you re looking at the way they re doing this, they re actually going in and not only do they want to destroy isis as an effective fighting force but they want to make sure that it doesn t go back to reinfect areas like western europe or in france and belgium in particular or do anything else with, you know, any of these areas. so they want to make sure that they can destroy this effort on the part of sirs aisis and it s to be interesting to see how isis responds to this. it s a major operation. mosul, the second largest city in iraq, still has not been completely liberated. they ve been trying for two years to do that. raqqa and syria, the capital, that s still under isis control. they ve got a lot of work to do. thanks very much. coming up, take a look at.