this is bbc news, the headlines. clashes have broken out in paris after three people were shot dead at a kurdish community centre. police have arrested a 69—year—old man with a history of acts of racist violence. and the us faces its coldest christmas in four decades as a storm sweeps across the country, with temperatures dropping to minus 45 degrees celsius in some places. the uk health secretary says he is "disappointed" by the announcement that nhs nurses in england are to stage further strikes on january the 18th and 19th. also in the uk, the head of the union representing striking border force staff says walkouts could go on for six months unless the government