Halliburton

Historical marker location:

Duncan, Oklahoma

( Marker is on U.S. 81, 0 miles north of W. Oak Ave., on the left when traveling south.)

Marker installed: 1999

The Oklahoma City bombing in 1995 was the deadliest act of domestic terrorism in U.S. history. The bombing, which was carried out by Timothy McVeigh and Terry Nichols, killed 168 people and injured hundreds more.