A protester speaks to the media during a peaceful protest on West Florissant Ave. in Ferguson, Missouri on August 19, 2014.  Police in the US city of St. Louis shot dead another suspect on Tuesday, a short distance from a suburb that is the scene of protests over the killing of Michael Brown, an unarmed black teenager.  St. Louis Police Chief Sam Dotson said in a tweet that officers had responded to a call and found an apparently agitated man, armed with a knife who yelled 'kill me now' and approached the patrol.     AFP PHOTO / Michael B. THOMAS        (Photo credit should read Michael B. Thomas/AFP/Getty Images)