Saddam Hussein invaded Kuwait, gassed his own people, and was definitely sitting on piles of WMD's (though not nearly to the extent Bush had us believe). Afgha

Saddam Hussein invaded Kuwait, gassed his own people, and was definitely sitting on piles of WMD's (though not nearly to the extent Bush had us believe). Afghanis hosted a terrorist group that did 9/11. So the situations are quite different. That doesn't necessarily justify invasion of either (but it possibly could) - point being those are not Ukraine analogues. US invading Canada would probably be a better analogy.