Modern Marvels: Vacuums

Take a ride along some of the world’s most dangerous roads. From Bolivia’s “Death Road,” to California’s fog-shrouded Highway 99, find the danger that waits behind every blind curve. Visit the Federal Highway Administration’s test laboratory to see what’s being done to make roads safer in the U.S. Finally, ride along in extreme four-wheel drive trucks with some adrenaline junkies that drive boulder-strewn trails just for the fun of it!