Survivors and estates of Iraqis killed during an infamous 2007 shooting involving a U.S. security company's contractors cannot sue the firm or its workers in federal court, a judge ruled Wednesday. U.S. District Judge Terrence Boyle said in his decision that nonresident aliens are typically unable to sue in federal court for injuries sustained outside the country. He sent the case back to a North Carolina [state] court, where the lawsuit was initially filed…The lawsuit accuses the security company formerly known as Blackwater and its contractors of wrongful death and negligence in the shooting that killed 17 Iraqis…It was filed on behalf of three people killed in the shooting…along with survivors of the dead and others who were wounded.