The OK City bombing of the Alfred P. Murrah Federal Building in 1995 was classified as the worst domestic violence since the Civil War. How thoroughly the US memory hole obliterated the really worst domestic unnatural tragedy between Appomattox and 9/11 . . . http://en.wikipedia.org/wiki/Tulsa_race_riot http://www.bing.com/images/search?q=1921+Tulsa+Riot+Pictures&qpvt=1921+Tulsa+Riot+Pictures&FORM=IGRE