A Dallas police officer covers his face as he stands with others outside the emergency room at Baylor University Medical Center, Friday, July 8, 2016, in Dallas. Snipers opened fire on police officers in the heart of Dallas on Thursday night, killing some of the officers. (AP Photo/Tony Gutierrez)

Police: 5 officers dead, 7 hurt in Dallas protest shooting

The National Law Enforcement Officers Memorial Fund, which tracks on-duty deaths, said it was the deadliest day for U.S. police since Sept. …