steven blank is a senior fellow at the american think tank, the foreign policy, richard research institute. welcome. what do you think ukraine aims to achieve with this big, the current incursion into russian territory? i think they intend to achieve a number of objectives. first of all, isaac psychologically the taking the war to russia, which is going to improve natalie domestic morale, but undermine russian morale, and show the russian people that russia is not waiting. and that's what can be brought home to them. secondly, they're going to probably take out tea, russell logistics targets, and the energy refinery centers in the pad of subject, which is the way they, uh, maybe a raid. i don't think it's really an invasion and they're going to undermine the as an army by striking out as logistics as they have done throughout the war, which has been a very effective tactics for them. so it's a very daring and high risk operation. but it seems to say to us, because it comes at a cost to write because ukraine's forces are quite stretched at the moment, particularly the don best region where