On Sept. 17, a driver rammed a car into the FBI’s Pittsburgh office gate and walked away ‘like nothing happened.’ The FBI is treating it as an act of terror. The white sedan bore profanity-laced messages. Witnesses say the driver threw an American flag onto the gate while shouting incoherently. No injuries were reported. Authorities launched a manhunt for Donald Henson, a former military man with mental health history, as investigators probe motive and threats.