Frank Sesno examines what might happen if a major hurricane hit Houston, the center of U.S. energy production, and the disaster was followed by terror strikes at oil installations in Saudi Arabia. Included: comments from energy expert Matt Simmons and former CIA director James Woolsey; and a look at petroleum alternatives. Also: a ride on a deep-water oil exploration ship in the Gulf of Mexico; and a visit to Brazil, where ethanol fuels 40-percent of the cars.