Acker as Prime Minister. April 12 – Bill Haley & His Comets record "Rock Around the Clock" in their first session for American Decca in New York City; it is released on May 20 as a B-side, but only in 1955 becomes a #1 hit, helping to initiate the rock and roll craze. April 14 Aneurin Bevan resigns from the British Labour Party's Shadow Cabinet in protest over his party's failure to oppose the rearmament of West Germany. A Soviet spy ring in Australia is unveiled. April 16 – Vice President Richard Nixon announces that the United States may be "putting our own boys in Indochina regardless of Allied support". April 22 The 1951 United Nations Convention Relating to the Status of Refugees comes into force, defining the status of refugees and setting out the basis for granting right of asylum. Senator Joseph McCarthy begins hearings investigating the United States Army for being "soft" on Communism. April 26 An international conference on Korea and Indo-China opens in Geneva. Akira Kurosawa's Seven Samurai is released in Japan. April 28 – U.S. Secretary of State John Foster Dulles accuses Communist China of sending combat troops to Indo-China to train Viet Minh guerrillas. May May 1 – The Unification Church is founded in South Korea. May 4 – General Alfredo Stroessner deposes Federico Chávez in a coup d'état in Paraguay; from August 15 he will hold the office of President until 1989. May 6 – Roger Bannister runs the first sub-four minute mile, in Oxford, England. May 7 – Vietnam War (run-up): The Battle of Dien Bien Phu ends in a French defeat (the battle began on March 13). May 8 – The Asian Football Confederation (AFC) is formed in Manila, Philippines. May 11 – U.S. Secretary of State John Foster Dulles declares that Indochina is important but not essential to the security of Southeast Asia, thus ending any prospect of American intervention on the side of France. May 14 The Boeing 707 airplane is released, after about 2 years of development. The Hague Convention for the Protection of Cultural Property in the Event of Armed Conflict was adopted in The Hague, Netherlands. May 15 – The Latin Union (Unión Latina) is created by the Convention of Madrid. Its member countries use the five Romance languages: Italian, French, Spanish, Portuguese, and Romanian. It will suspend operations in 2012. May 17 Brown v. Board