We are on the 2011 Student Freedom Riders bus rolling toward Augusta, Ga., watching "The Murder of Emmett Till," a PBS documentary on the savage 1955 lynching of a black boy in the nothing town of Money, Miss. On the old newsreel footage, white person after white person spews the grotesque bigotry that was common to white people in that time and place, and somebody asks Ryan Price a question:
How do you feel as a white guy, watching a film like this?
"It was a good question," he tells me that evening at the hotel. He pauses a long time, thinking.
"Watching 'The Murder of Emmett Till' as a white person," he says, "it's hard not to...