Jen and Wendy Yuengling are two of the four sisters in charge of the Yuengling beer company. Their father, Dick, took over the family business back in 1985. He was the one who turned it from a local brewery into America’s largest independent craft brewery—last year it produced more than 2 million barrels of beer. Now it’s his daughters’ turn to take the business in new directions, and they're rising to the challenge.