Ukraine needs heavy weapons and air support. Tanks, multiple-launch rockets, self-propelled artillery, air support — MiGs and Sukhoi aircraft — and mobile air defense. They need hundreds of thousands of 152mm artillery rounds. The US-supplied Javelins and Stingers are necessary but no longer sufficient. Why? Because there is a window of opportunity now — for a week or two perhaps — in which Ukraine can counterattack in the north, south and east to expel Russian forces. This will require mobile armored forces and air power. And if this window is lost, the future is darker and more uncertain. [cut] NO...