Note that in this documentary, they showed how it’s possible to use strategically placed nukes throughout the liquid hot magma of the earth’s core to inject enough angular momentum that it can resume its rotation. Presumably, we could just use a little more energy to stop the rotation and subsequently start it back up in the opposite direction. We should be able to test this theory in just a few days, but we’d have to get more than $100 billion (2003 dollars) of unobtanium which, obviously, we won’t be able to do until we get the economy back in shape.