Researchers for the Cost of War Project of the Watson Institute for International and Public Affairs at Brown University have calculated the cost of the wars we have waged in the post 9/11 era. An astounding $8 Trillion.  30-35% of those dollars are spent on war contractors, anywhere from the small companies that provide food service and uniforms for ground troops to the mega-companies like Lockheed-Martin, Boeing, Raytheon, General Dynamics and Northup-Grummond that build warcraft, missiles, surveillance systems and other weaponry.