FILE - Firefighters and ambulance attendants remove a covered body from the 16th Street Baptist Church in Birmingham, Ala., after a deadly explosion detonated by members of the Ku Klux Klan during services on Sept. 15, 1963. Threats against Black institutions are deeply rooted in U.S. history and leaders say the history of violence against people of color should be passed on to new generations so the lessons of the past can be applied to the present. (AP Photo, File)