– The Government of the United States authorizes the Twenty-fourth Amendment to the United States Constitution, outlawing the poll tax. February 5 – India backs out of its promise to hold a plebiscite in the disputed territory of Kashmir. In 1948, India had taken the issue of Kashmir to the United Nations Security Council and offered to hold a plebiscite in the held Kashmir under UN supervision. February 6 – Cuba cuts off the normal water supply to the United States Guantanamo Bay Naval Base, in reprisal for the U.S. seizure four days earlier of four Cuban fishing boats off the coast of Florida. February 10 – Melbourne–Voyager collision: 82 Australian sailors die when a Royal Australian Navy aircraft carrier and a destroyer collide off New South Wales, Australia. February 11 Greeks and Turks begin fighting in Limassol, Cyprus. The Republic of China severs diplomatic relations with France because of French recognition of the People's Republic of China. February 17 – Gabonese president Léon M'ba is toppled by a military coup and his arch-rival, Jean-Hilaire Aubame, is installed in his place. However, French intervention restores M'ba's government the next day. February 25 – Cassius Clay (later Muhammad Ali) beats Sonny Liston in Miami Beach, Florida, and is crowned the heavyweight champion of the world. February 26 – U.S. politician John Glenn withdraws from the race for the Democratic Party Senate nomination, following a domestic accident. February 27 – The Italian government asks for help to keep the Leaning Tower of Pisa from toppling over. March March 6 Constantine II becomes King of Greece, upon the death of his father King Paul. Boxer Cassius Clay announces the change of his name to Muhammad Ali. March 9 New York Times Co. v Sullivan (376 US 254 1964): The United States Supreme Court rules that under the First Amendment, speech criticizing political figures cannot be censored. The London Fisheries Convention is signed, giving signatories the right of full access to fishing grounds within 12 nautical miles of the western European coastline. March 10 Soviet military forces shoot down an unarmed reconnaissance bomber that had strayed into East Germany; the 3 U.S. flyers parachute to safety. Henry Cabot Lodge Jr., United States Ambassador to South Vietnam, wins the New Hampshire Republican primary. March 12 – Malcolm X leaves the Nation of Islam. March 14 – A Dallas, Texas, jury finds Jack Ruby guilty of