Henry Paulson, U.S. treasury secretary, with Ben S. Bernanke, chairman of the U.S. Federal Reserve, Timothy Geithner, president of the Federal Reserve Bank of New York and others, in Washington D.C., on Oct. 14, 2008. (Photographer: Jay Mallin/Bloomberg News)

Lehman Brothers Collapse: Henry Paulson, Ben Bernanke And Tim Geithner Look Back

As Lehman Brothers filed for bankruptcy protection on Sept. 15, 2008, and the rest of the financial system in the developed world ground to a halt, it fell to three policymakers to undertake a number of unprecedented measures to stave off a second Great Depression in the United States.

10 years later, Former Federal Reserve Chairman Ben Bernanke and former U.S. Treasury Secretaries Henry Paulson and Tim Geithner reveal why they did what they did.