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

Photo by: Alastair Grant

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