February 27, 2008 6:24 PM

Nobel laureate estimates wars' cost at more than $3 trillion

When U.S. troops invaded Iraq in March 2003, the Bush administration predicted that the war would be self-financing and that rebuilding the nation would cost less than $2 billion. Five years later, a Nobel laureate estimates that the wars in Iraq and Afghanistan are costing America more than $3 trillion.

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