During the ensuing Omaha Race Riot of 1919 in September, a white ethnic mob from South Omaha took over the Douglas County Courthouse.

It was, Mr. Kleinknecht shows, a window into another lucrative racket of the new ethnic mobs, in this case the ascendant Fujianese mafia.

In 1919, after Red Summer, a time of racial riots in several major industrial cities, a mostly ethnic immigrant white mob from South Omaha terrorized the city's African-American population.

Also in this period was the Chicago Race Riot of 1919, in which ethnic white mobs killed numerous blacks, and burned residential districts, leaving thousands of blacks homeless.

In 1917, white ethnic mobs had attacked blacks in Saint Louis and East St. Louis race riots over competition for work and punishment for strikebreakers.

More than 4,000 people were forced from their homes and 19 were killed when ethnic Albanian mobs attacked Serbs and other minorities in March this year.

The violence began in Mitrovica and spread across the region as ethnic Albanian mobs attacked the province's minority Serb community.

Here Nato forces managed to fend off the ethnic Albanian mob just as they were beginning their rampage.

In retaliation, ethnic white mobs killed 35 blacks, mutilated the bodies and threw them into the Mississippi River.

Smoke still rises from some of the embers of buildings where some 320 people lived until last week, when they were forced from their homes by an ethnic Albanian mob.