intelligence, air superiority, so for now the u.s. officials are fairly confident that because the russians have not been successfully interfering with those convoys with those shipments that they are getting into the right hands here. but, of course, a u.s. official did tell cnn last night that that could change, that they re concerned that the russians could actually ramp up their attacks on these convoys as they try to impact the ukrainians ability to fight off this new offensive in the donbas effectively. so what we re seeing now is u.s. officials are just monitoring this, they say that it is not science, tracking these weapons over the border, but they do realize that the risk here of not arming ukrainians properly is much higher than the risk of these weapons perhaps falling into the wrong happeneds. especially now as barbara mentioned we re entering this new phase of the war, tank on tank battle, scenes reminiscent from world war ii. thank you. i want to bring in our jim