A FEDERAL judge sentenced four former Blackwater security guards to lengthy prison terms on Monday (April 13) in the 2007 massacre of 14 unarmed Iraqis, closing a chapter of the U.S. war in Iraq that tested relations between the two countries. Nicholas Slatten was sentenced to life in prison for his murder conviction in the killings at a Baghdad traffic circle. U.S. District Court Judge Royce Lamberth sentenced three other former Blackwater guards, convicted of manslaughter […]