Foreign relations of Cuba needed oil. Relations between the countries deteriorated rapidly. In April 1961, following air attacks preparing for the Bay of Pigs Invasion by CIA-trained Cuban exiles, prime minister Fidel Castro declared Cuba to be a socialist republic, and moved quickly to develop the growing relations between Cuba and the Soviet Union. In 1962, Cuba was expelled from the Organization of American States. Shortly afterwards, many nations throughout Latin America broke ties with Cuba, leaving the island increasingly isolated in the region and dependent on Soviet trade and cooperation. Following the establishment of diplomatic ties, and after the Cuban missile crisis in
1996 shootdown of Brothers to the Rescue aircraft had not been utilized, and that this conflicts with the ICAO principle that interception of civil aircraft should be undertaken only as a last resort. It is also claimed the Cuban Air Force did not make any attempt to direct the aircraft beyond the boundaries of national airspace, guide them away from a prohibited, restricted or danger area or instruct them to effect a landing. Following the incident, the United Nations Security Council passed Security Council Resolution 1067 (1996), a U.S.-sponsored resolution condemning Cuba. Dissenting members believed that the resolution was singling out Cuba for condemnation, and instead should have