In case you haven't heard the story, Nichelle Nichols felt she wasn't doing much on Star Trek, and was going to quit the show. During that time, she was introduced to Martin Luther King Jr., who told her that she shouldn't leave the show because she was playing a black woman on TV and she wasn't a maid. She was playing our future- us working and living together as equals.
Well, many years later, to see this picture:
Really brings the message home- Nichelle Nichols, standing with Barack Obama, the first Black President of the United States, holding up the Vulcan salute.