DALLAS, United States (AFP) – by Thomas Urbain with Carlos Hamann in Washington The Dallas gunman was plotting a major bomb attack, authorities said, urging calm as hundreds of people were arrested in weekend protests in US cities over police violence against African-Americans. Demonstrators marched demanding justice for two black men shot dead by cops in Minnesota and Louisiana, their dying moments captured in video that went viral online. Peaceful marches attracted large crowds in […]