about red lines. i generally shy away from it myself. i recommend assad be rather cautious about violating international law with chemical weapons, i suppose that could be considered a red line. it will not spiral out of town. secretary of state tillerson is in moscow and we maintained communications with the russian military and with the diplomatic channels. it will not spiral out of control. >> what gives you that assurance, the russians have been clear on your rrhetoric. the russians are saying another response like the one you launched on april 6th would be a red line for them. how are you so confident this isn't going to spiral out of control? >> i'm confident the russians will act in their own best interest and there's nothing in their best interest to say they want this situation to go out of control. >> yes, ma'am. >> as you consider the u.s. force posture after isis is