Police departments across the country on Friday reacted to the deadly sniper attack on officers in Dallas by taking precautions to guard against copycats and other potential threats.
An Army veteran killed by Dallas police after the sniper slayings of five officers amassed a personal arsenal at his suburban home, including bomb-making materials, bulletproof vests, rifles, ammunition and a journal of combat tactics, authorities said Friday.
The mayor and police director urged residents of the state's largest city on Friday to remain peaceful while protesting recent police shootings of black men and said they're taking additional measures to protect officers after the sniper attack killings of five officers in Dallas.
President Barack Obama says America is "horrified" over the shootings of police officers in Dallas and there's no possible justification for the attacks.