Next month marks the 50th anniversary of the assassination of the great civil rights activist. In this programme Sir Trevor McDonald travels to America’s Deep South to understand what Martin Luther King Jr. really meant to people, and also gets to grips the horrors of lynching that occurred in 20th century USA. McDonald also interviews people including Rev. Al Sharpton and General Colin Powell about King means to them, and even meets a former member of the Ku Klux Klan. Martin Luther King by Trevor McDonald is on ITV at 21.00.