hmmmm.......it depend of the cases.
In Iraq : not really to eliminated Saddam, but to get the Oil, and all the trade advantages.
USA say that France did an hypocrit politic with Iraq and generally....but USA should look back : To counter the communist, they put dictatorships, like in Chile, and now they give lesson of integrity.....
US do war only for thier interests, not to save some country...Because if the US war had really a good aim, why they won't go to North Korea; the dictatorship is worts than in Iraq, and in North Korea you can be sure that there is WMD.....really really moer dangerous than Iraq..........and with Nuclear weapon....but Bush said : Iraq is a danger for US security....of course, North Korea, with all these might, and who is openly hostile to USA, is not a danger, or less important.
Give me a good war.
a war is always for land, might, power, ressources, like oil, gold..........these are not good reason.