Blackwater Worldwide security guard Nick Slatten (C) and attorneys leave the federal courthouse after being arraigned with 4 fellow Blackwater guards on manslaughter charges for allegedly killing 14 unarmed civilians and wounding 20 others in a 2007 shooting in Baghdad, in Washington in this January 6, 2009 file photo. A federal judge threw out all charges on December 31, 2009 against five Blackwater Worldwide security guards accused of killing 14 Iraqi civilians in 2007, saying the U.S. government had recklessly violated the defendants' constitutional rights. Picture taken January 6, 2009. REUTERS/Jonathan Ernst/Files (UNITED STATES - Tags: CRIME LAW POLITICS CIVIL UNREST)