1917-1963 1925-1968 1928- 1928-1998 1929-1968 1964-1975 1968 20thcentury africanamericans afscme assassinationkennedy biography conspiracy domesticterrorism extradition history innercities jamesearl king martinluther memphis officialsandemployees racerelations raceriots ray robertf sanitationworkersstrike socialconditions unitedstates whitesupremacymovements