In 1950, the World Congress of the Supporters of Peace adopted a permanent constitution for the World Peace Council, which replaced the Committee of Partisans for Peace. The opening congress of the WPC condemned the atom-bomb and the American invasion of Korea. It followed the Cominform line, recommending the creation of national peace committees in every country, and rejected pacifism and the non-aligned peace movement. It was originally scheduled for Sheffield but the British authorities, who wished to undermine the WPC, refused visas to many delegates and the Congress was forced to move to Warsaw. British Prime Minister Clement Attlee denounced the Congress as a "bogus forum of peace with the real aim of sabotaging national defence" and said there would be a "reasonable limit" on foreign delegates. Among those excluded by the government were Frédéric Joliot-Curie, Ilya Ehrenburg, Alexander Fadeyev, and Dmitri Shostakovich. The number of delegates at Sheffield was reduced from an anticipated 2,000 to 500, half of whom were British.