The meteoric rise and stunning collapse of Enron caused many to question why the watchdog system that was supposed to protect investors failed to sound any alarms about the company's dubious financial underpinnings. But Enron and Arthur Andersen are the tip of the iceberg. In the late 1990s, Enron was just one of the more than 400 corporations forced to dramatically restate their value because of accounting lapses, failures or fraud.

Alternate title on container: Frontline: Bigger than Enron.