A newly released Justice Department report says that the FBI missed at least five opportunities before the Sept. 11 attacks to uncover what it calls vital intelligence information about the alleged hijackers. The report by the department’s Inspector General says the bureau didn’t aggressively pursue the information it did have. The report blames the FBI for not knowing about the presence of two of the alleged hijackers in the United States and for not following up on an agent’s theory that Osama bin Laden was sending students to U.S. flight training schools. The report is a year old and is only now being released because of a court fight with lawyers for accused 9/11 conspirator Zacarias Moussaoui.