I was a teenager, growing up in the Richard Allen housing project of North Philadelphia, when Emmett Till was lynched in Money, Mississippi, on Aug. 28, 1955, and his brutalized, unrecognizable body later recovered from the Tallahatchie River. From 1882-1968, 4,743 lynchings occurred in the United States. Roughly 73%, or 3,446, were black people, and …