Yul travels to Nazareth, Pennsylvania, to meet the people who work at Martin Guitars. The company lies in the state's Lehigh Valley, which has seen many businesses close over the years, but Martin Guitars has remained open.
Our modern electric power grid has been called the biggest and most complex machine in the world - delivering electricity over 200,000 miles of high-tension transmission lines. Travel around the country with host Yul Kwon to understand its intricacies.
Over the past century, an American industrial revolution has given rise to the biggest, most productive food machine the world has ever known. Join host Yul Kwon to learn how this machine feeds nearly 300 million Americans every day.