Britain's Prime Minister David Cameron speaking to the media outside 10 Downing St. in London, Thursday, May 23, 2013. (AP Photo/Alastair Grant) ** FILE **

Photo by: Alastair Grant

Britain's Prime Minister David Cameron speaking to the media outside 10 Downing St. in London, Thursday, May 23, 2013. (AP Photo/Alastair Grant) ** FILE **