NEARLY TWO YEARS AGO, in the introduction to an hour-long PBS documentary called Saddam's Ultimate Solution, former Clinton State Department spokesman James P. Rubin said:"Tonight, we examine the nature of the threat posed by Saddam Hussein. Ten years after the Gulf War and Saddam is still there and still continues to stockpile weapons of mass destruction. Now there are suggestions he is working with al Qaeda, which means the very terrorists who attacked the United States last September may now have access to chemical and biological weapons."The documentary, broadcast on July 11, 2002, laid out in exhaustive detail alleged Iraqi...