Modern Marvels: Tuna

America would come to a standstill without trucks. Trucks transport a staggering 70 percent of all the nation’s goods. Explore the amazingly diverse world of American trucks and the colorful men and women who drive them. Join country superstar Brad Paisley and his crew of truckers on the road between Little Rock and Tulsa–racing the clock to be on time for Brad’s next concert. In Dearborn, Michigan, climb aboard one of the most popular pickups–the Ford F-150–as it tackles a devilish test course. And in Virginia, see how fast the world’s most nimble tow truck can extract a car from the tightest parking spot imaginable. Meet a Mack truck fanatic and his cool collection of vintage models, and ride-along with an unsung hero with a truly dirty job–operating a truck designed to empty and clean portable toilets.