Well, in the article you posted, it said that Bush Administration sources gave this information. Whether it could be credible or not, it certainly gives drive to their position in Iraq at the current moment. This is why the United States are officially going in, to "Liberate the people of Iraq from the tyranny of Saddam Hussuein and find those banned weapons". However, in spite of the "proof" they have shown, heavy opposition sitll exist's throughout the world.
Apparently, China, Russia, Japan, France, Germany, Canada and many other countries feel that Saddam isnt a threat, and chances are he isnt harbouring these kinds of weapons that are being looking for in Iraq. Americans, British, Polish (GROM) and Australians havent found any sort of weapons of mass destruction.
And just to cease a rebuttle on the Japan comment; Yes, Japan is for this war, since its started.
Three-fourths of all Japanese say Prime Minister Junichiro Koizumi's backing of the U.S.-led invasion of Iraq was inevitable, according to a Japanese newspaper poll Tuesday.
Source:
http://thestar.com.my/news/story.asp?file=/2003/3/25/latest/10981Poll76&sec=latest
Reasons for this?
Japan has no real access to oil, and once someone (like the United States) dominates the oil market, Japan has no choice but to go through them. The same with France, Germany and the other European nations that have to go through this oil transaction. Canada is fairly well off since we have oil depost's in Alberta. But now since the war has started, France plans to have a massive part in post-war reconstruction plans in Iraq, and Japan is pro for this war now as to... in my personal opinion, get on the good side of the United States.
But I dont see why Iraq or Russia wouldnt be allowed to sell or have these weapons. Iraq is now in war, an illegal war. If its not going to be seen as an illegal war, I dont see why not the Saddam regime can't use illegal weapons. I mean, United States used chemical agents such as Agent Orange, right? And its more so Russian third-parties selling them these weapons, not the Russian government.