LONDON - Britain is looking for a 'proportionate way' to respond to the threat posed by Russia, a spokesman for Prime Minister Theresa May said on Tuesday, after a retired Russian army official said the poisoning of a former spy could start a new world war. 'We need to respond in a proportionate way to this aggressive behavior from Russia and that's what we're doing,' the spokesman said when asked if there was a real risk of triggering a war. Evgeny Buzhinsky, a retired lieutenant general, was quoted in British newspapers on Tuesday as saying the fallout of the attack could trigger 'the last war in the history of mankind.'
