Twitter CEO apologizes for allowing white supremacist ad

(Reuters) - Twitter's Chief Executive Jack Dorsey apologized on Thursday after the microblogging service let through an ad promoting a white supremacist group. "We made a mistake here and we apologize. Our automated system allowed an ad promoting hate. Against our policy. We did a retro and fixed," Dorsey tweeted. http://bit.ly/2f4MLcV The ad titled "'New Article: The United States Was Founded as a White People's Republic' on NEW ORDER website" showed eight white children in a field. It was twee