This month marks the 50th anniversary of a landmark moment in this country's civil right era, the 1961 Freedom Rides, during which more than 400 Americans traveled through the South on buses to challenge Jim Crow laws.

"Freedom Riders" (UNC-TV, 9 tonight) recounts this story, powerfully, retracing each arduous, inspirational, painful ,and ultimately successful step  on a journey that tested the notion of non-violent activism.

The documentary isn't always easy to watch, mostly because those interviewed have such vivid memories of what they experienced, what they lived through. Thus, the hatred, the fear, the courage, the determination, the moments of clarity and triumph feel so present. That also makes it a must watch.