TOPSHOT - Police officers stand guard at a baracade following the sniper shooting in Dallas on July 7, 2016. A fourth police officer was killed and two suspected snipers were in custody after a protest late Thursday against police brutality in Dallas, authorities said. One suspect had turned himself in and another who was in a shootout with SWAT officers was also in custody, the Dallas Police Department tweeted. / AFP PHOTO / Laura Buckman (Photo credit should read LAURA BUCKMAN/AFP/Getty Images)
