Every CIO and IT executive has lessons to learn from Hurricane Katrina. Disasters come in many forms. Mother Nature is responsible for earthquakes, hurricanes, tsunamis, and blizzards. Other types of disasters are man-made -- viruses, hacker attacks, or terrorist attacks can also completely disable an organization's IT abilities. The risk is that any of these attacks could take down an organization's IT operations, and that can result in lost revenue, a drop in a company's stock price, regulatory penalties, and the loss of customers to competitors.