When was the associate and cousin of  Michael X died  who co founded black nationalism and social change organization US?
Maulana Karenga Maulana Ndabezitha Karenga (born Ronald McKinley Everett; July 14, 1941) is an African-American professor of Africana studies, activist and author, best known as the creator of the pan-African and African-American holiday of Kwanzaa. Karenga was a major figure in the Black Power movement of the 1960s and 1970s, and co-founded with Hakim Jamal the black nationalism and social change organization US.
Leon Jordan Leon Mercer Jordan (May 6, 1905, Kansas City, Missouri - July 15, 1970, Kansas City, Missouri) was an American police officer, politician and civil rights leader who was assassinated. He was "one of the most influential African Americans in Kansas City's history" and, at the time of his death, the "state’s most powerful black politician".