The F-16s will need parts, logistics, and weapons, the pilots and ground crews will need extensive training… those jets will do nothing this year. Perhaps next year though. I agree that Ukraine is fighting with one arm tied due to NATO fears of nuclear retaliation. Is that a reasonable fear? I think so. Putin is not a sane or reasonable person. And Ukraine has shown the capability to hit Russian targets within Russian territory. If the Ukrainians were allowed to hit harder, deeper, more sensitive targets in Russia, the war would escalate – Russia would not want to be seen as beaten by its little neighbor. A shame, agree or disagree, but right now, those are the rules of war that Ukraine must abide by for continued support from NATO.