Change at Number 10 Downing Street - British Prime Minister David Cameron starts his first day at work

Britain's new prime minister is already hard at work. Conservative leader David Cameron is heading up a center right coalition - a rare thing in British politics - with the Liberal Democrats. Their leader Nick Clegg takes on the office of deputy prime minister. Cameron acknowleged that working in tandem would pose challenges, as will steering Britain toward economic recovery. But he and Clegg promised strong government and a new kind of politics.