Discover that the deadliest snakes, sports and weather events are closer and more treacherous than you think. Travel to the slopes of Mt. Rainier, America's most dangerous volcano, and find out why 100,000 people could be in serious trouble. Watch where you step, because the most dangerous snake in the U.S. slithers in great numbers and has a short temper. Learn where the most dangerous weather phenomenon, the tornado, can cause the most damage. We'll look for protection for the most dangerous hits football can muster.