For those late to the party, here is a summary of why the war on Iraq is happening.
They've won. They got their war against Afghanistan (planned before September 11). They're getting their war against Iraq (planned slightly after September 11). After Iraq, they plan to get their wars against Syria, Lebanon, Iran and Saudi Arabia. Last Sunday, one of them, Vice President Dick Cheney, said that President George W Bush would have to make "a very difficult decision" on Iraq. Not really. The decision had already been taken for him in the autumn of 2001.