So often, we take water for granted. But it's not always where we need it, or there when we need it. Two rivers on opposite sides of the country — the Chattahoochee in the South and the Klamath in the far West — may provide lessons for the inevitable and growing dispute over how we manage our most precious resource.

Sure, Aldrin has been to the moon, but what does he know about getting mooned? We'll quiz him to find out with a game called "Drop your pants and take a bow."