If you've read this site before -- let's face it, you haven't -- you know that I think the most significant change to our geopolitical environment that should and probably will happen in the next 20 years is switching from oil to hydrogen. Iceland has the right idea -- switch government vehicles to hydrogen, work out the kinks there, then when that technology has paid for itself, the people will be convinced. As Ghandi said, "You must be the change you wish to see in the world." Want hydrogen powered vehicles, Mr. President? Start using them.