VATICAN CITY: Pope Leo on Wednesday criticized the “illusory security” of the global nuclear deterrence system, in an appeal on the 80th anniversary of the United States dropping an atomic bomb on the Japanese city of Hiroshima at the end of the Second World War. Leo, the first US-born pope, said in his weekly audience that the destruction in Hiroshima, which killed about 78,000 people instantly, should serve “as a universal warning against the devastation caused ...