The head of the National Hurricane Center says it's only a matter of time until the U.S. is hit by a storm worse than Katrina. But what is being done to prepare for an event which many consider to be inevitable. Mayfield was one of the few people in our government who did their job leading up to Katrina and his warnings should be taken very seriously. However hurricane preparedness is not on the national agenda, cities from Houston to New York remain vulnerable to an event that Mayfield described as a "Mega-disaster".