Dallas Police Chief David Brown collects himself while talking about …

AP | published: July 8, 2016

Dallas Police Chief David Brown collects himself while talking about Thursday night's shooting during a news conference, Friday, July 8, 2016, in Dallas. Snipers opened fire on police officers in the heart of Dallas Thursday night, during protests over two recent fatal police shootings of black men. (Mark Mulligan | Houston Chronicle via AP)