Enron: The Smartest Guys in the Room

Portfolio.com delves into the records of chief executives over the years, and breaks it down to the worst 20 CEOs of all time.

When Enron filed for bankruptcy protection, it joined the ranks of the largest companies in history to do so.

Over the years, people from CEOs to traders have tried to take advantage of the system. Here are some of the most notorious over the past two decades.