Bureaucratic infighting between the FBI and the Department of Homeland Security is hampering progress in the largest investigation of suspected terrorism financing in the United States, according to federal law enforcement sources. The FBI was given jurisdiction over all terrorism financing investigations in March, when the Customs Service became part of the newly created Department of Homeland Security. It has since moved to take over the sprawling investigation of an interlocking network of Northern Virginia-based charities and businesses that are suspected of funneling millions of dollars to al Qaeda and other Middle Eastern terrorist organizations. But the Homeland Security agents who developed the case have been reluctant to give up the investigation, and the FBI’s involvement in the probe has been slowed, officials with both agencies said. Full Story