Willy Brown and the ensuing Omaha Race Riot. Trying to defend Brown, the city's mayor, Edward Parsons Smith, was lynched also, surviving only after a quick rescue. Like other industrial cities in the U.S., Omaha suffered severe job losses in the 1950s, more than 10,000 in all, as the railroad and meatpacking industries restructured. Stockyards and packing plants were located closer to ranches, and union achievements were lost as wages declined in surviving jobs. Many workers left the area if they could get to other jobs. Poverty deepened in areas of the city whose residents depended on those jobs, specifically North and South Omaha. At the same time, with reduced revenues, the city had less financial ability to respond to longstanding problems. Despair after the April 1968 assassination of Martin Luther King Jr. contributed to riots in North Omaha, including one at the Logan Fontenelle Housing Project. For some, the civil rights movement in Omaha, Nebraska evolved towards black nationalism, as the Black Panther Party was involved in tensions in the late 1960s. Organizations such as the Black Association for Nationalism Through Unity became popular among the city's African-American youth. This tension culminated in the cause célèbre trial of the Rice/Poindexter Case, in which an Omaha Police Department officer was killed by a bomb while answering an emergency call. Whites in Omaha have followed the white flight pattern, suburbanizing to West Omaha. In the late 1990s and early 2000s, gang violence and incidents between the Omaha Police and Black residents undermined relations between groups in North and South Omaha. Economy With diversification in several industries, including banking, insurance, telecommunications, architecture/construction, and transportation, Omaha's economy has grown since the early 1990s, and six national fiber optic networks converge in Omaha. Omaha's most prominent businessman is Warren Buffett, nicknamed the "Oracle of Omaha", who is regularly ranked one of the richest people in the world. Four Omaha-based companies: Berkshire Hathaway, Union Pacific Railroad, Mutual of Omaha, and Kiewit Corporation, are among the Fortune 500. Omaha is the headquarters of several other major corporations, including the Gallup Organization, TD Ameritrade, Werner Enterprises, First National Bank, Gavilon, Scoular and First Comp Insurance. Many other large national firms have major operations or operational headquarters in Omaha, including Bank of the West, First Data, Sojern, PayPal, LinkedIn, Pacific Life, MetLife and Conagra Brands. The city is also home to three of the 30 largest architecture firms