LONDON, ENGLAND - APRIL 30:  British Prime Minister David Cameron and Prime Minister of Pakistan Muhammad Nawaz Sharif hold a meeting in the White Room of Number 10 Downing Street on April 30, 2014 in London, England. During his visit to the UK, Mr Sharif is scheduled to meet with David Cameron, address an Investment Conference and meet members of the Pakistani Diaspora.  (Photo by Oli Scarff - WPA Pool /Getty Images)