Was when terror struck Oklahoma City. He bombed the Alfred P. Murrah Federal Building, housing Federal government. Killed were some 160+ individuals and injuring more than 680 with a fertilizer bomb. His motive was for retaliation for the Waco Siege, Ruby Ridge, other government raids and general U.S. foreign policy.
It was the deadliest act of terrorism within the United States prior to the September 11 attacks, and remains the most significant act of domestic terrorism in United States history.