The Alfred P. Murrah Federal Building bombing occurred on April 19, 1995, in Oklahoma City, Oklahoma, United States. It was one of the deadliest terrorist attacks in American history up to that point. The bombing was carried out by Timothy McVeigh and Terry Nichols, who detonated a truck bomb outside the Alfred P. Murrah Federal Building, a nine-story office complex housing several federal agencies.

The explosion resulted in the collapse of a significant portion of the building, causing massive destruction and claiming the lives of 168 people, including 19 children who were in the building's daycare center. Hundreds more were injured in the attack, and the blast caused extensive damage to nearby buildings and infrastructure.

The bombing shocked the nation and prompted a massive response from law enforcement agencies, emergency services, and the federal government. It also led to significant changes in security measures and anti-terrorism legislation in the United States.

Timothy McVeigh, a former U.S. Army soldier, and Terry Nichols were both convicted of carrying out the bombing. McVeigh was sentenced to death and executed by lethal injection on June 11, 2001, while Nichols received multiple life sentences without the possibility of parole.

The Oklahoma City bombing remains a stark reminder of the threat posed by domestic terrorism and the importance of vigilance in protecting against such attacks. The site of the bombing is now home to the Oklahoma City National Memorial & Museum, dedicated to honoring the victims, survivors, and first responders of the tragedy.