The U.S. has spent about $600 billion to fight in Iraq and Afghanistan since 2001.

Huh, I thought it was more like a trillion.  I think you're leaving some things out.

What's your source STH? 

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According to the Con gressional Research Service, the combined cost of the Iraq war (Operation Iraqi Freedom, in Pentagon jargon) and its companions, Oper ation Enduring Freedom, in Afghan istan, and the Global War on Terror, could eas ily top $600 billion this year. Staggering as that number is, Nobel laureate Joseph Stiglitz and Harvard economist Linda Bilmes calculated that the real cost exceeds $2 trillion. The annual congressional appropriations for the wars— averaging $127 billion—are bigger than the global markets for soap, heroin, or gambling. Monthly spending for the wars in Iraq and Afghanistan averaged $6.8 billion last year, according to the Department of Defense’s comptroller. That figure is now closer to $8 billion a month.

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http://www.portfolio.com/news-markets/international-news/portfolio/2007/03/29/Weapons-of-Mass-Production