In this 1919 photo provided by Chicago History Museum, a crowd of men and armed National Guard stand in front of the Ogden Cafe during race riots in Chicago. Red Summer, as the summer of 1919 came to be known, saw white-on-black violence in big cities like Washington and Chicago and small towns like Elaine, Ark., and Bisbee, Ariz. (Chicago History Museum/The Jun Fujita negatives collection via AP)