11. David Cameron

Title: Prime Minister of the UK

Country: UK

Age: 49

Reelected for a second term in May with a majority, British Prime Minister David Cameron has strengthened his negotiating position with the EU. Cameron is committed to gaining concessions from the 28-nation bloc, including looser rules on welfare for immigrants an regulation of businesses, but many Britons are skeptical that the prime minister can secure a better deal. He's promised an "in or out" referendum for the country, but Cameron believes remaining in the EU is in his country's best interest and has been visiting EU leaders to sell them on his proposal.

Cameron met with Queen Elizabeth after the election to talk about his plan for the next five years, which, in addition to renegotiating his country's terms with the EU, includes a controversial plan to crack down on immigration.