this has been from the very beginning. did the u.s. wait too long on this front for the f-16s, for air? >> yes. it absolutely did, erin. what should have happened is about two months into this war starting from february of last year we should have started the training of f-16 pilots or at least the transition of ukrainian pilots into f-16s. that would have then given the ukrainians time to get familiar with the platform, be able to employ the platform and also get familiar with the avionics. plus it would have also allowed them to train maintenance troops as well as the intelligence forces and radar operators in order to effectively employ this weapons system in a combined arms manner. and that would be the kind of thang w thing that would have been necessary. at this point we're going to be racing against the clock in several different ways and that's going to be very tough on the ukrainians. >> and michael, all in the u.s. has spent about $100 billion pledged in aid to ukraine.