Atlanta Police Chief Richard Pennington said Sunday his department will review its policy on "no-knock" warrants and its use of confidential informants after an elderly woman was fatally shot by plainclothes officers. Pennington's comments on the incident were the first since Kathryn Johnston was killed Tuesday night after she shot three narcotics officers, who were serving a warrant at her home when they were met with gunfire from the woman. The chief was out of town last week for the Thanksgiving holiday and said he was unable to get a flight back to Atlanta sooner. The officers entered the home...