In 1956, WJC leaders delivered a memorandum to Soviet leaders Nikolai Bulganin and Nikita Khrushchev during their visit to London, and a year later the World Jewish Congress Executive launched a worldwide call to attention regarding the plight of Jews in the Soviet Union and other Communist countries. This resulted in a growing international campaign for their cultural and religious rights and for the reunion of families separated by the Cold War. After a lapse of seven years, the organization also re-established contact with several Jewish communities in Communist Eastern Europe. In 1957, the Jewish community of Hungary re-affiliated with the WJC.