Have we seen America's future through the eyes of hurricanes Katrina and Rita? Monster storms drowning cities and obliterating coastlines. Jobs vanishing and prices rising as ports and pipelines close. Millions fleeing, but many are trapped and die. Chaos reigns, paralyzing government and leaving the world's wealthiest society humbled and frightened. Natural disaster in the United States has morphed to a dangerous new level. Some experts say the nation can expect to be pummeled by more of these mega-catastrophes over the next 20 or 30 years in a nasty conspiracy of unfavorable weather patterns, changing demographics and political denial. A...