David Walker, comptroller general of the U.S., totaled up our government's income, liabilities and future obligations. He concluded the numbers d... (more)

David Walker, comptroller general of the U.S., totaled up our government's income, liabilities and future obligations. He concluded the numbers don't add up. Steve Kroft reports for 60 Minutes.
(CBS) This segment was originally broadcast on March 4, 2007. It was updated on July 8, 2007. (less)