(FILES) US civil rights leader Martin Luther King, Jr., waves to supporters from the steps of the Lincoln Memorial 28 August, 1963, on The Mall in Washington, DC, during the “March on Washington” where King delivered his famous “I Have a Dream” speech. 04 April, 2005 marks the 37th anniversary of the assassination of King, who was shot 04 April 1968 in Memphis, Tennessee. James Earl Ray confessed to shooting King and was sentenced to 99 years in prison. King’s killing sent shock waves through American society at the time, and is still regarded as a landmark event in recent US history. AFP PHOTO/FILES