Overview: Headlines for July 08, 2016; Dallas: Five Police Officers Shot Dead; Obama Condemns 'Vicious, Calculated and Despicable Attack'; Marc Lamont Hill: Dallas Shootings Can’t Deter Us From Continuing Movement Against State Violence; Baton Rouge NAACP President Demands Arrest Of Police Officers Who Killed Alton Sterling; 'They Are Here to Kill Us Because We Are Black': Girlfriend of Philando Castile On Police Shootings; Voices From the Streets: Thousands March in NYC Against Police Violence, 40 Arrested