Elsewhere, people see it differently, including in the Vatican. John Allen addressed this issue earlier in the year, when he talked about how refinements to just war teaching for the 21st century would be one of the principal major issues facing Pope Benedict XVI. He notes that many Catholic Americans-- such as Robert George, Fr. Richard John Neuhuas, George Weigel and Michael Novak-- tried (to various degrees) to argue that Bush's invasion of Iraq was in not line with just war teaching. See here for a summary of this work. Much of it revolves around the nature of modern terrorism. But the Vatican did not buy this line in the Iraqi context, largely because of concerns about "last resort" and "competent authority" (this refers to the UN).
But, in the words of John Allen:
"...Vatican diplomats, and to some extent Benedict XVI, size up the global situation differently than many American analysts. Especially key is the question of sovereignty, and the extent to which one can meaningfully speak of a global sovereignty invested in international organizations such as the United Nations. Does justice ad bellum in the 21st century require that the United Nations approve the use of force? A closely related issue is the rule of law, and the binding force of international law. Events may well compel the pope to clarify how the traditional principles of Just War analysis, or "humanitarian intervention," should be applied to new historical circumstances."