A note written in the margins of a newspaper smuggled into Birmingham jail in 1963 became one of the most poignant messages of Martin Luther King Jr's activism, warning that the biggest impediment to freedom would be those who are "more devoted to order than justice"--otherwise known as the "white moderate." 

Many find this message to ring true today, with some pointing at Senate lawmakers who won't allow an exception to the filibuster in order to pass voting rights legislation. 

For more, KCBS Radio news anchors Holly Quan and Dan Mitchinson spoke with Dennis Parker, Executive Director at the National Center for Law and Economic Justice.