On the 50th anniversary of the Birmingham Church Bombing, Melissa Harris-Perry remembers the four little girls that were killed by white supremacists, and how their legacy has lived on as martyrs in the Civil Rights Movement. Joy Reid, from TheGrio.com, Soledad O’Brien of the Starfish Media Group, Anthea Butler from University of Pennsylvania and The Nation’s John Nichols join the discussion.Sept. 15, 2013
