Although close allies for decades, the U.K. has one major difference to its American cousin: the Monarchy. Presidents have come and gone for hundreds of years with each political party fighting it out for a place at the White House. And yet, the British Monarchy has remained a constant, witnessing the rise and fall of governments from across the Atlantic. But what happens when one of the world's most powerful political leaders meets one of the world's most powerful families? This is When the Windsors Met the Obamas.