On April 19, 1993, the standoff between the FBI and the Branch Davidians (led by David Koresh) at the Davidian compound in Waco, Texas ended in a fiery tragedy.
When the FBI tried to end the standoff by gassing the complex, the entire compound went up in fire, claiming the lives of 75 followers, including many young children. The death toll was high and many people blamed the U.S. government for the tragedy.
One such person was Timothy McVeigh.
McVeigh, angered by the Waco tragedy, decided to enact retribution to those he felt responsible — the federal government, especially the FBI and the Bureau of Alcohol, Tobacco, and Firearms (ATF).
In downtown Oklahoma City, the Alfred P. Murrah Federal Building held numerous federal agency offices, including those of the ATF.