Britain has pulled out agents from live operations in "hostile countries" after Russia and China cracked top-secret information contained in files leaked by former U.S. National Security Agency contractor Edward Snowden, the Sunday Times reported. Security service MI6, which operates overseas and is tasked with defending British interests, has removed agents from certain countries, the newspaper said, citing unnamed officials at the office of British Prime Minister David Cameron, the Home Office (interior ministry) and security services. SNIP Russia and China have both managed to crack encrypted documents which contain details of secret intelligence techniques that could allow British and...