 Multiple things. So probably most tactically obvious is, you know, one of the first things you learn in Marine officer training is you want to stage your troops outside of the radius of your enemy's weapon systems. And that's what the Russians are doing, not dumb. And so they're staging their troops on the other side of the border outside of Ukrainian weapon system ranges. That tactical advantage would be obviated by allowing Ukraine to strike them, not just near Kharkiv, but everywhere.