Behind every billionaire is a ... mom. That's what Mary Mazzio found as she interviewed billionaires around the world for her new film -- "Lemonade Stories". The study of entrepreneurship might be all the rage in business schools but Mary suggests that b-school is too late. The nursery is where the seeds are planted, generally by moms. Incidentally, women led 28% of all U.S. businesses in 2002, employing more than 10 million and generating $1.5 trillion in sales.
