The clip features visuals from powerful moments in U.S. history.
Ava DuVernay on the highs and lows of making Selma.
Sheyann Webb shares photos from her days as a young freedom fighter.
Sheyann Webb shares memories of her friend, Dr. Martin Luther King.
"Glory," "Respect" and more tunes for the fight for equality.
According to AP, President Obama and some surviving marchers will visit Selma this weekend to talk about how the country has—and has not—changed since the "Bloody Sunday" assault.