This only goes to show your lack of knowledge. If nato or america were to enter this war, they’d need to establish air superiority, yeah russia may have some AA battery’s in ukraine but most would be kept in russia and maybe Belarus while still being completely able to shoot down american or nato planes flying in the ukraine airspace. There is no way america or nato would establish air superiority without that and the risk to troop casualties without that blanket would be far too high for most nato countries including the usa to stomach, what i suggest is you get the hell back to your normal job and stop pretending you know a god damn thing about anything regarding military offensives. It’s people like you that are an absolute embarrassment to this subreddit