These Marines just showed us what it means to be true Americans This week, the nation continues to mourn the loss of five police officers in Dallas who were murdered by a racist gunman during a protest. The New York Times reports that the heavily armed sniper who gunned down police officers in downtown Dallas specifically set out to kill as many white officers as he could. As it turns out, the shooter was a military veteran who had served in Afghanistan, and he kept bomb-making materials in his home. The gunman took a peaceful demonstration against police shootings to a devastating scene of violence and hatred. Authorities said 25-year-old Micah Johnson was not tied to any protest or political group. Still, his Facebook account shows that he supports the New Black Panther Party. Three other people were arrested in connection with the shooting, though officers have not named them or confirmed why they are being held. Demonstrations continued Friday in cities across the county, with one of the largest taking place in Atlanta. Thousands of people who were protesting police abuse actually brought traffic to a standstill. 