george bowers joins us now from washington. d. c. he's a russia and ukraine analyst at the institute for the study of war. george, welcome us. officials are stressing this is something of a tactical decision intended to help you create in forces defending car key from correct. first of all, do we know what kind of attacks are on the table and what are off limits? i thank you very much for having me. yes. right now we know that the ukrainians are only allowed to use our artillery for counter battery fire. we know that the ukrainians are allowed to use gamers, the highmark, the rockets, to be able to strike russian forest concentrations, command control, logistics brokers, and that sort of thing off the table right now are, do you present ability to use attack comes longer range procedure and the fire missiles at the head, other targets. we also know that this is specifically only for the border areas adjacent, the heart here, and not the rest of the other regions of russia. does this potentially open the door to other permissions to us