Dependency on oil

It was a surprise to hear George W Bush say,” Our addiction to oil is a matter of national security concern." This is the first time I've heard him acknowledge the United States dependency on oil is a problem.

The initial reason for the US invasion of Iraq was to remove Saddam because he was producing WMD.

This leaves the question, what was the primary reason for the invasion? Was it to create a democracy in the Middle East, create employment and profit for the military industrial complex at home or to control the world's second largest oil supply?

I'm interested in your opinion.