In August of 1967 Martin Luther King addressed the National Association of TV and Radio Announcers (NATRA.) His place in civil rights history is indisputable at this point. But he was also one of the last great American orators. MLK had a lot of respect for the power of media figures large and small and he goes on at length urging them to respect and acknowledge their role and responsibility..
Below is that speech at NATRA in it's entirety with thanks to Davey D for posting it on YouTube.