FILE - In this April 4, 2004, file photo, plainclothes contractors working 

FILE - In this April 4, 2004, file photo, plainclothes contractors working for Blackwater USA take part in a firefight as Iraqi demonstrators loyal to Muqtada al-Sadr attempt to advance on a facility being defended by U.S. and Spanish soldiers in the Iraqi city of Najaf. Iraq. With thousands of civilian contractors remaining in Iraq and Afghanistan, Justice Department officials want Congress to resolve a legal issue that they say obstructs efforts to prosecute any such workers who rape, kill or commit other serious crimes abroad. (AP Photo/Gervasio Sanchez, File)
Associated Press
FILE - In this April 4, 2004, file photo, plainclothes contractors working for Blackwater USA take part in a firefight as Iraqi demonstrators loyal to Muqtada al-Sadr attempt to advance on a facility being defended by U.S. and Spanish soldiers in the Iraqi city of Najaf. Iraq. With thousands of civilian contractors remaining in Iraq and Afghanistan, Justice Department officials want Congress to resolve a legal issue that they say obstructs efforts to prosecute any such workers who rape, kill or commit other serious crimes abroad. (AP Photo/Gervasio Sanchez, File)
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