A New Zealand peace activist is facing serious assault charges after he allegedly punched a rock singer in London, leaving the man in a coma. Christiaan Briggs, 30, who spent three weeks in Iraq with the Truth Justice Peace Human Shield Action Group in 2003, appeared at Highbury Corner Magistrates' Court on Tuesday to face a charge of grievous bodily harm. Police say the incident occurred on June 22 when Briggs allegedly punched 19-year-old Billy Leeson, causing the rising rock star to hit his head on the ground. Leeson, the lead singer with rock band Les Incompetents - who have...