This summer, research by the Equal Justice Initiative revealed that there were 3,959 lynchings of black Americans between the end of Reconstruction in 1877 and 1950. That's 700 more than previously reported. Bryan Stevenson, the founder of the Equal Justice Initiative, is working to put up historical markers for every lynching. He's a Harvard-educated lawyer, who's argued cases before the US Supreme Court. He's also the grandson of an American slave.