Sep.09 -- Hong Kong leader Carrie Lam’s biggest concession yet to protesters did little to stem scenes of violence that have become the norm on weekends in the Asian financial hub. Small pockets of demonstrators on Sunday set fires, vandalized subway stations and set up barricades downtown after tens of thousands marched peacefully to the U.S. consulate to appeal for help from President Donald Trump. Riot police cleared roads and subway stations. Karen Leigh reports on "Bloomberg Surveillance."
