
The losses underscore the challenges the U.S. and its international partners face in overcoming corruption in Afghanistan.
A central part of the Obama administration's strategy has been to award U.S.-financed contracts to Afghan businesses to help improve quality of life and stoke the country's economy.
But until a special task force assembled by Gen. David Petraeus began its investigation last year, the coalition had little visibility into the connections many Afghan companies and their vast network of subcontractors had with insurgents and criminals — groups military officials call "malign actors."
In a murky process known as "reverse money laundering," payments from the U.S. pass through companies hired by the military for transportation, construction, power projects, fuel and other services to businesses and individuals with ties to the insurgency or criminal networks, according to interviews and task force documents obtained by the AP.
"Funds begin as clean monies," according to one document, then "either through direct payments or through the flow of funds in the subcontractor network, the monies become tainted."
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The conclusions by Task Force 2010 represent the most definitive assessment of how U.S. military spending and aid to Afghanistan has been diverted to the enemy or stolen.