On Sunday, September 15, 1963, the 16th Street Baptist Church in Birmingham, Alabama, was bombed by four members of a Ku Klux Klan-affiliated racist group. Addie Mae Collins, Denise McNair, Carole Robertson and Cynthia Wesley, four African-American girls between the ages of 11 and 14 who had been attending the church's Sunday school, were killed in the blast. Director Spike Lee's somber 1997 documentary tells the story through new interviews and archival footage.