The financial crisis has raised one very serious question. If the crash was so bad, why weren't some bankers charged with crimes? They were charged after the crash in 1929 - the head of the New York Stock Exchange went to prison. And after the savings and loan scandal in the 1980s, and after the dot.com giants like Enron went belly up after promising investors they had strong balance sheets. So what happened this time? Why did only one Wall Street banker end up in prison? ProPublica's Jesse Eisinger has been investigating and tells us what he found.