Law Enforcement on High Alert Around the Country
Security expert and former police officer Steve Kardian told Inside Edition: "Based on the current political climate, how could a police officer walk the street and feel safe in this time and era?"
The protest in Dallas was in response to two black men who were shot by police earlier in the week.
The protests, intended to be peaceful, were carried out in Dallas, New York and Oakland, among other places.
Retired NYPD detective Harry Houck broke down in tears Friday as he spoke to CNN about the killings of the Dallas police officers
"You have a 9mm handgun; you are taking on somebody with an automatic weapon. You have a bullet-proof vest that will not stop that round. I hope people can really appreciate what these police officers did," he said.