A protester takes shelter from smoke billowing around him Aug. 13, 2014, in Ferguson, Mo. Protests in the St. Louis suburb rocked by racial unrest since a white police officer shot an unarmed black teenager to death have been marred by violence, with some people lobbing Molotov cocktails and other objects at police who responded with smoke bombs and tear gas to disperse the crowd. (AP Photo/St. Louis Post-Dispatch, David Carson)