Lawrence McDonald is a managing director of Pangea Capital Management and the cofounder of Convertbond.com. He was, until 2008, vice president of distressed debt and convertible securities trading at Lehman Brothers and wrote the bestselling A Colossal Failure of Common Sense.

Exactly two years after the bank failure that triggered the meltdown, former Lehman exec Lawrence McDonald shows how those events cost taxpayers $60 billion—and a new round of headaches today.