Ferguson demonstrators to march 120 miles to Missouri state capital By Daniel Wallis and Edward McAllister FERGUSON, Missouri (Reuters) - Activists gathered in Ferguson, Missouri, on Saturday to begin a 120-mile march to the state capital Jefferson City to protest the killing of an unarmed black teen by a white police officer, a case that has rekindled a national debate over U.S. race relations. About 100 people were expected to take part in the seven-day march organized by the National Association for the Advancement of Colored People (NAACP), with more joining segments of the long walk, NAACP staff member Jamiah...