William Clay Ford, owner of the Detroit Lions football team and youngest grandson of the famous Henry Ford, has a net worth of $1.2 billion. And while he probably has his famous family to thank for much of that net worth, he's done OK for himself in a field that is wholly separate from the auto industry: Professional football team ownership. During World War II, Ford enlisted in the United States Navy Air Corps and fought for his country, even though is family's wealth could have almost certainly provided him with a deferment. In those days it was much more common for people who were well off to serve in the military. In 1947, he married Martha Firestone of the famous Firestone family, two years before he received a Bachelors of Science degree in Economics from Yale University. After this, he worked at the Ford Motor Company, heading up the Continental division and developing an updated model of the famous Continental called the Continental Mark II. Ford lore says that during his time at the Continental division, William Clay Ford had only two photographs on the wall: One of the Continental designed by his father, and his updated Mark II. It was in 1963 that he purchased a controlling interest in the Detroit Lions, which he retains to this day.