The Boeing 707 is actually rather stale news. It's just getting re-publicized.
Speaking of new publicity, the Czechs are again insisting that their own evidence of the connection between Atta and Iraqi intelligence is pretty solid.
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We also know of a prominent Al Qaeda bad guy who moves freely within Iraq and even operates a chemical weapons production facility in Northern Iraq. (The Kurds have been aware of this facility for some time, and the Taliban was reportedly aware of the chemical weapons connection between Al Qaeda and Iraq.) Does this prove that Saddam was involved in the 9/11 attack? No, but it solidly supports the theory of a meaningful Al Qaeda linkage to Iraq. And I think that's all we really need--since the Al Qaeda definitely did attack us on 9/11.
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"Saddam invaded his own neighbors, Iran and Kuwait"... not a valid argument for War under Christian Just War theory (and never was). Iran and Kuwait are not US States, therefore I do not have the right to send someone else's son to die on their behalf.
I agree that this is not ordinarily regarded as a justification for war. But it can get complicated. (For example, if there were a mutual defense treaty between us and those other countries, however, I think that would completely change the picture. "Iran and Kuwait" would become "us," so to speak.)
"Saddam might develop Weapons of Mass Destruction"... not a valid argument for War under Christian Just War theory. The fact that you and your neighbor don't get along, and he might buy a gun tomorrow, does not actually make shooting him today a Jesus-like Moral Action.
With all due respect, this argument by analogy suffers from the fact that it's just "you versus him." I think the more interesting, more ugly scenario involves a bad guy who somehow reveals to you that he is going to acquire a gun and murder your entire family when you are asleep.
Add to this the idea that you have called the police and they have laughed at you.
"Saddam gassed his own citizens, etc!!" Morally atrocious, certainly. However, Iraq's citizens are not US citizens any more than Iranian or Kuwaitis are... not a valid argument for War under Christian Just War theory.
This is one of the failings of Just War Theory, in my opinion.
To illustrate: Can a group of volunteers go help the poor Iraqis by forcibly deposing Saddam? Correct me if I am wrong, but I don't think Aquinas addressed that scenario. (Are we not "all of one blood" anyway? And what about the Chaldean Christians who are suffering?)
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As an aside, I will point out that even if you and I both conclude that the attack on Iraq is justified, the Vatican is NOT GOING TO COME AROUND.
Isn't that interesting?