of city facilities in the late 1950s, the 1964 event of Omahan Gale Sayers becoming the first African American NFL player to share a room with a white player, and the 1966 production of the Oscar-nominated documentary A Time for Burning, which tracked the sentiment of 1960s white Omaha towards African Americans. In 1968 Marlin Briscoe, a football star and graduate of a local high school, became the first black quarterback in the American Football League, and in 1970 local barber and law school graduate Ernie Chambers was elected to the Nebraska State Legislature as the newest African American state legislator, preceded by other African Americans Edward Danner, John Adams Sr. and his son John Adams Jr. The Negro History Society formally opened the Great Plains Black History Museum in 1976 with the goal of celebrating African American contributions to the city and region. While the Omaha civil rights movement of the 1950s and 1960s did not gain its goals of passage of state laws to ensure equal housing and job opportunities, it did succeed in securing integrated school busing, and employment with the municipal transit company, for example. The movement also was seen as successful in raising awareness of the inequities facing African Americans in Omaha. 1972–present The City of Omaha installed the Dr. Martin Luther King Jr. Cornerstone Memorial at the NW corner of 24th and Lake Streets in 2002. In 2003, native Omahan Thomas Warren was named the city's first African American police chief. His advancement could be seen as part of the political progression of African Americans in the city. In 2005, Ernie Chambers became the longest-serving State Senator in Nebraska history, with more than 32 years of service to his community and state. Because of a term-limit bill enacted in the Nebraska State Legislature, Chambers was not allowed to immediately run for reelection when his term expired in 2009, so he waited until 2013 and ran again. He was reelected consistently until term limits again prevented him from running again in 2021. In total Ernie Chambers represented North Omaha in the Legislature for 46 years. In response to West Omaha districts' concerns about schools, Senator Chambers proposed a controversial school separation plan for Omaha in the Nebraska State Legislature. He lobbied to create three districts in the city. Each was to be drawn along geographic boundaries that loosely correlated to the residential (and racial) housing