G20 violence prompts calls for new curbs on anti-capitalist militants

German politicians call for Europe-wide extremism database as minister says events highlight 'leftwing scene's readiness to use violence' Allies of the German chancellor, Angela Merkel, have called for new curbs on leftwing extremists, including a Europe-wide register, after her decision to hold the G20 world leaders' summit in Hamburg ended in violent clashes and injuries to nearly 500 police officers. The cost of the damage has not yet been established but is expected to run into millions. Mer...