forces. but also because of what it affects in the city of raqqa. it's not only going to affect the water supply but, most importantly, the electricity. when you're in a situation you can cut off power to a town and you can control the amount of power in a government source, that causes an uprising in the citizens as we saw so frequently in iraq when i was there in combat operations. the very fact they can shut that down to the power of the town means they can affect the transfer of oil supplies, gasoline, the pumping of gas, heating, cooking, all of those sorts of things and it will make the citizens of that town rise up even faster against isis and cause them to have problems with their governing capabilities. >> you mentioned forces are about to spike the ball on isis but after disappointing events this year, it's certainly positive developments. lieutenant general mark hertling, thank you for your insight. we appreciate it. >> thank you, errol.