Zone. After learning from Hajek that Captain Jerabek was secretly expressing anti-communist opinions to his family, the Org dispatched a Czech refugee and veteran field agent codenamed "Ondrej" to make contact with the Captain and his family in Prague. During the night of 8-9 November 1948, after being warned by "Ondrej" of an imminent Stalinist witch hunt for "rootless cosmopolitans" within the Czechoslovak officer corps, Captain Jerabek and two other senior Czechoslovakian military intelligence officers crossed the border into the American Zone and defected to the West. In addition to several lists of Czechoslovakian spies in West Germany, Captain Jerabek also carried the keys to breaking Czechoslovakian intelligence's codes. The results were nothing less than devastating for Czechoslovakian espionage and led to multiple arrests and convictions. The security and efficacy of the Gehlen Organisation were compromised by East German and Soviet moles within it, such as Johannes Clemens, Erwin Tiebel and Heinz Felfe who were feeding information while in the Org and later, while in the BND that was headed by Gehlen. All three were eventually discovered and convicted in 1963. There were also Communists and their sympathizers within the CIA and the SIS (MI6), especially Kim Philby and the Cambridge Spies. As such information appeared, Gehlen, personally, and the Gehlen Organisation, officially, were attacked by the governments of the Western powers. The British government was especially hostile towards Gehlen, and the politically Left wing British press ensured full publicisation of the existence of the Gehlen Organisation, which further compromised the operation. Federal Intelligence Service (BND), 1956–1968 On 1 April 1956, 11 years after World War II had ended, the U.S. Government and the CIA formally transferred the Gehlen Organisation to the authority of what was by then the Federal Republic of Germany, under Chancellor Konrad Adenauer (1949–63). By way of that transfer of geopolitical sponsorship, the anti–Communist Gehlen Organisation became the nucleus of the Bundesnachrichtendienst (BND, Federal Intelligence Service). Gehlen became president of the BND as an espionage service, until he was forced out of office in 1968. The end of Gehlen's career as a spymaster resulted from a confluence of events in West Germany: the exposure of a KGB mole, Heinz Felfe, (a former SS lieutenant) working at BND headquarters; political estrangement from Adenauer, in 1963, which aggravated his professional problems; and the inefficiency of the BND consequent to Gehlen's poor leadership and continual inattention to the business