 Britain's Labour Party, writes CBS News, swept power Friday after more than a decade in opposition as a jaded electorate handed the party a landslide victory, but also a mammoth task of reinvigorating a stagnant economy and dispirited nation. Labour Party leader Keir Starmer officially became prime minister later Friday, leading his party back to government less than five years after it suffered its worst defeat in almost a century. In the merciless choreography of British politics,