But that didn't stop U.S. government contractors from paying Bout-controlled firms roughly $60 million to fly supplies into Iraq in support of the U.S. war effort, according to a book released last year by two reporters who investigated Bout. And it didn't prevent the U.S. military from giving Bout's pilots millions of dollars in free airplane fuel while they were flying U.S. supply flights.

From 2003 through at least 2005, Pentagon contractors used air cargo companies known to be connected to Bout to fly an estimated 1,000 supply trips into and out of Iraq, according to "Merchant of Death: Money, Guns, Plans, and the Man Who Makes War Possible" by Douglas Farah and Stephen Braun. A Pentagon spokesman confirmed to the authors that the military gave 500,000 gallons of fuel to Bout's pilots.