More than 1,000 people gathered in downtown Dallas to attend a candlelight vigil for the five police officers killed during a protest march.
Speakers at the Monday night vigil included police officials and friends of the slain officers. Portraits of the officers were propped up in front of the speaker's platform.
Dallas Police Chief David Brown told the crowd that police officers are like superheroes.
Dallas Area Rapid Transit Chief J.D. Spiller said he would challenge anyone who thought what happened would tear the city apart. He says Texas must lead on race relations in America, and on supporting and protecting police officers.
Four Dallas police officers and one DART officer were killed in Thursday's attack.