Queen Elizabeth II holds many records during her time as head of the British monarchy. For instance, the 90-year-old Queen is the longest-reigning monarch in British history. She was crowned in 1953 and her 60 years on the throne was celebrated in June 2012 with the Diamond Jubilee. During her reign, there have been many prime ministers. With the resignation of David Cameron Wednesday and acceptance of Theresa May as new prime minister, the Queen has seen 14 PMs during her reign. Can you name them all?...