Bush’s fault, for sure.
That's what it says on the can.
Now that we've all had our fun with it, this is really science fiction. Controlled fusion is not a reality. it took the Saturn probe seven years to get to Saturn, and Uranus is over twice as far away. There is no unallocated Pu238 available to power any outer solar system probes, and although the author contends that Uranus's gravity is less than 1 at the at some level in the atmosphere (which I'm to lazy to check) The gravitational gradient to escape is much deeper than earth's, etc. So science fiction, but not very entertaining science fiction.