Noah's Ark is the oldest example of a contingency plan, described in the Hebrew Scriptures as a great boat designed to save Noah, his family, and a fair few animals from the great flood. It's nothing new, therefore, to plan for the unexpected whether that is natural or man-made disasters. And there are plenty of examples to glean lessons from, including the recent fires of southern California, Hurricane Katrina, the U.S. terror attacks of 9/11, to name only a few.