by Olivia HAMPTON WASHINGTON, United States (AFP) — Four police officers were killed and seven others wounded by snipers in chaotic scenes in Dallas during a protest against police shootings of black men, with a suspect warning that bombs were planted throughout the city center. City Police Chief David Brown said two snipers shot at “police officers from elevated positions during the protest/rally.” A civilian was also wounded. Police were continuing to exchange gunfire with […]