Ku Klux Klan installed a bomb at a black church in Birmingham in Alabama, USA. Four girls were killed. Addie Mae Collins, Cynthia Wesley, Carole Robertson and Carol Denise McNair. Another 22 people were injured. The KK was founded in 1865 as a far-right terrorist organization and became millions of affiliates and followers in the 1920s. It has left a significant racist mark in the country after causing thousands of victims.