Britain threat level still at 'severe', airport terminal evacuated

By Sarah Young LONDON (Reuters) - Prime Minister David Cameron said on Saturday the threat to Britain remained "severe" after the Paris attacks, as a terminal at a major UK airport was evacuated as a precaution amid heightened security fears. Cameron did not raise the threat level to its highest "critical" level, which would have meant an attack is expected imminently, after discussing the attacks at an emergency response committee in London. Islamic State has claimed responsibility for a coordi