Key Findings:

• The Center for Public Integrity’s six-month investigation produced the most comprehensive information to date about the American companies that landed U.S. taxpayer contracts in the two nations targeted in Washington’s war on terror. More than 70 American companies and individuals won up to $8 billion in contracts for work in postwar Iraq and Afghanistan in 2002 and 2003. Kellogg, Brown & Root, the engineering and construction arm of Halliburton, tops the list of contractors.

• These companies contributed more money to the presidential campaigns of George W. Bush — more than $500,000 — than to any other politician over the last dozen years.