A recent study by the National Highway Traffic Safety Administration concludes that there is a correlation between roof strength and the likelihood of injury and death in rollover accidents, especially in Sport Utility Vehicles (SUV's). Each year, an estimated 7,000 people are killed or severely injured in rollovers in which the roof is crushed, according to federal statistics. According to the Detroit News, Federal regulators plan to propose stiffer roof standards later this year, creating a showdown between automakers, safety advocates and political officials.