Live updates: Nation reacts after Dallas sniper attack kills 5 police officers

In the deadliest ever day for Dallas law enforcement, five officers were slain after a sniper opened fire on a Thursday night demonstration, organized to protest the police-involved shootings of two black men this week. This is a developing story and we will be posting all breaking updates and the outpouring of social media reaction here.

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Officers killed by sniper in Dallas protest over police shootings >>>

Newspapers react to Dallas attack against police officers >>>

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A Dallas police officer steps out of a vehicle as he arrives in front of Baylor University Medical Center where several others were police were already gathered, Friday, July 8, 2016, in Dallas. (AP Photo/Tony Gutierrez)
A Dallas police officer steps out of a vehicle as he arrives in front of Baylor University Medical Center where several others were police were already gathered, Friday, July 8, 2016, in Dallas. (AP Photo/Tony Gutierrez)