A protester gestures in front of police officers at a rally against the death in Minneapolis police custody of George Floyd, in Columbia, South Carolina, US, May 30, 2020. [Reuters]
Civil unrest flared and curfews were imposed in several major US cities on Saturday as demonstrators took to the streets to vent outrage at the death of a black man shown on video gasping for breath as a white Minneapolis policeman knelt on his neck.