Three white students at the University of Mississippi face possible federal civil rights charges after a photograph emerged showing the fraternity brothers posing with guns next to a bullet-riddled sign honoring Emmett Till, the 14-year-old African-American boy whose killing 64 years ago remains one of the most horrific examples of racial terror in the Jim Crow South. The photo posted to social media by one of the young men was taken at the site where Till’s body was recovered from the Tallahatchie River in 1955. It was the latest act of vandalism targeting the plaque set up by the Emmett Till Memorial Commission, after a similar desecration in August of last year. Thursday would have been Emmett Till’s 78th birthday.