The 46th vice-president of the US, Dick Cheney, has a fondness for remaining invisible. It doesn't matter whether it's Google Earth or a bank of television cameras, he won't play ball. He rarely presents himself to the media, and when he does so he likes to keep it in the family....there's a growing consensus in America that it's Dick Cheney who calls the shots at the White House, on everything from the war in Iraq to climate change policy.