FRONTLINE investigative correspondent Lowell Bergman examines the shadowy world of international bribery. The story reveals how multi-national companies create slush funds, set up front companies, and make secret payments, all to get billions in business. But these practices are facing a new international crackdown, led by prosecutors at the U.S. Department of Justice and allies abroad. At the center of this is a controversial, ongoing investigation into the British-based multi-national BAE Systems and allegations about billion-dollar bribes.