Hoxha and Shehu tapped the Albanians' deep-seated fear of Yugoslav domination to remain in power during the thaw following the Twentieth Party Congress of the Communist Party of the Soviet Union in 1956, when Khrushchev denounced Stalin's crimes in his "secret speech". Hoxha defended Stalin and blamed the Titoist heresy for the troubles vexing world Communism, including the disturbances in Poland and the rebellion in Hungary in 1956. Hoxha mercilessly purged party moderates with pro-Soviet and pro-Yugoslav leanings, but he toned down his anti-Yugoslav rhetoric after an April 1957 trip to Moscow, where he won cancellation of about US$105 million in outstanding loans and about US$7.8 million in additional food assistance. By 1958, however, Hoxha was again complaining about Tito's "fascism" and "genocide" against Albanians in Kosovo. He also grumbled about a Comecon plan for integrating the East European economies, which called for Albania to produce agricultural goods and minerals instead of emphasizing the development of heavy industry. On a twelve-day visit to Albania in 1959, Khrushchev reportedly tried to convince Hoxha and Shehu that their country should aspire to become "socialism's orchard".