Osama was, in fact, born in Saudi Arabia. He was, also, kicked out of the country, due to his political statements against the country when they supported the U.S. rather than Iraq in the first Gulf War. Iraq was believed to have more items which could be used for terrorism by the most dangerous groups, such as al Qaeda, in part due to the close ties with those groups.
Iraq did have WDM's. They had plenty being used preceding the first Gulf War, and plenty left after, which they knew that the rest of the world was aware of. The Iraqi regime refused to destroy them, failing to fulfill U.N. sanctions. They also had several research programs going on, confirmed by discovered documents and by testimony of refugee scientists from Iraq. Satellite tracking has shown evidence over the last several years that equipment/chemicals/supplies have been moved very often from place to place, making an extremely large grid of possible locations. The weapons themselves are easy to hide, and the fact that we haven't found them yet does not mean that they are not there, it just means we've not covered the right 15% of Iraq.
As for the proposed failure of securing Iraqi oil (mentioned earlier in this thread), I believe that is complete nonsense. The U.S. has enough oil to easily supply itself for the 40 to 50 years taking into account the current rates of growth in usage. With alternative fuels on the verge of taking over the energy market, fossil fuels will not be needed nearly as much as they are now. Also, our government prefers to get oil from the American continents. One of the biggest reasons we do buy oil is due to trade and trade agreements.
One thing that I'd like to mention is that progress isn't always visible. I'm referring to prevention. You can easily see if progress isn't made in prevention, like with terrorist attacks. They happen without proper prevention. The fact is, there have been no terrorist attacks against the U.S. since 9-11, despite there being several promises from legitimate sources. Another thing; 9-11 wasn't directly Bush's fault or caused by him, the vital intelligence flaws occured during the previous presidency.
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