epa04349847 A photo made available on 11 August 2014 shows police officers positioning themselves along W. Florissant Road, in Ferguson, near St. Louis, Missouri, USA, 10 August 2014, one day after a St. Louis county police officer reportedly shot and killed unarmed 18-year-old Michael Brown. The FBI has opened an inquiry into the incident. EPA/DAVID CARSON / ST. LOUIS POST-DI MAGS AND TV OUT HANDOUT EDITORIAL USE ONLY/NO SALES