Oklahoma City bombing

In 1995, the U.S. John Murragh Federal Building was bombed by a U.S. citizen, Timothy McVeigh, with a violent anti-government agenda. Before the 9-11 attacks, it produced the heaviest casualty count of any terrorist incident in the U.S., killing 168, injuring hundreds, destroying a substantial office building, and damaging other structures. McVeigh placed the truck bomb alone, although he had one collaborator in building it, Terry Nichols.

The reasons for the attack were never totally clear, although McVeigh and Nichols appear to have had revenge for the Federal raid on the Branch Davidians in Waco, Texas. They were influenced by a militant groups generally characterized as of the extreme right; the incident has some parallels to events in a novel, The Turner Diaries.