urban redevelopment did not please the UAW's largely white, conservative membership. The members repeatedly voted for conservative mayoral candidates, such as Republicans Albert Cobo (mayor 1950-57) and Louis Miriani (mayor 1957-62), for they protected white neighborhoods from residential integration. Home ownership was not just a very large financial investment for individuals, it was also a source of identity for men who remembered the hardships and foreclosures of the Great Depression. Sugrue says, "Economically vulnerable homeowners feared, above all, that an influx of blacks would imperil their precarious investments." As mayor in 1957–62, Louis Miriani was best known for completing many of the large-scale urban renewal projects initiated by the Cobo administration. These were largely financed by federal money, due to his rejection of implementing a city tax. Miriani also took strong measures to overcome the growing crime rate in Detroit. The United Automobile Workers (UAW), then at the height of its size and power, officially endorsed Miriani for re-election, stressing what they viewed as his conservative "law and order" position. However, while some African Americans praised Miriani for helping to break down racial divides, other disagreed with the UAW that Miriani did enough. Historian David Maraniss cites milestones in 1962-64 that marked the city's sharp decline: the failure of a plan to host the Olympics; urban renewal uprooting black neighborhoods; urgently needed police reforms that stalled; and the failure to transform Detroit through the Model Cities and War on Poverty programs. Tensions started building that exploded in the 1967 riot, the most costly and violent in the country during a summer of numerous riots in cities. The 1970s brought a worldwide energy crisis with high gasoline prices. For the first time, the American industry faced serious competition from imported automobiles, which were smaller and more fuel-efficient. German Volkswagens and Japanese Toyotas posed a growing threat. Civil rights and the Great Society In June 1963, Rev. Martin Luther King Jr. gave a major speech in Detroit that foreshadowed his "I Have a Dream" speech two months later. In Detroit, King was accompanied by Rev. C. L. Franklin. Detroit played a major role in the civil rights movement of the 1960s; the Model Cities Program was a key component of President Lyndon B. Johnson's Great Society and War on Poverty. Begun in 1966, it operated five-year-long experiments in 150 cities to develop new anti-poverty programs and alternative forms of municipal government. The