Ukraine is also permitted to use U.S.-supplied air defense systems to strike Russian planes “if they’re about to fire into Ukrainian airspace,” Dietz said.

So Patriot is allowed to shoot down Russian planes if they're about to fire into Ukrainian airspace but does that mean that Ukraine isn't allowed to destroy the planes if they're just sitting on the runway not in that current moment firing missiles at Ukraine? That's an incredibly dumb restriction if that was the case.

ATACMS on all the airfields and ATACMS on Rostov-on-Don (Southern Military District) would be a massive blow to Russia.