rest of the National Guard and had the constitution amended to allow him to run for yet another term in 1955. In January of that same year, Somoza Garcia, in collusion with the dictator of the Dominican Republic Rafael Trujillo, supported an unsuccessful invasion of Costa Rica from Nicaragua by exiled supporters of former President Rafael Calderón Guardia, with the Nicaraguan National guard providing air cover to the operation. In September 1956, Somoza Garcia was fatally shot by a young dissident poet, Rigoberto López Pérez, and was succeeded in the presidency by his elder son, Luis Somoza Debayle, while his youngest son Anastasio Somoza Debayle, a graduate of the United States Military Academy at West Point became the Chief Director of the National Guard. Brutal repression of the internal political opposition followed suit. In 1957, the National Guard was involved in the only external military action of its existence, a brief border skirmish with Honduras. In 1961, the National Guard cooperated with the U.S. Central Intelligence Agency in the preparation for the abortive Bay of Pigs Invasion of Cuba, permitting its bases to be used for training and staging areas. From May 1965 to September 1966, one infantry company of the National Guard participated in a peacekeeping operation in the Dominican Republic alongside U.S., Brazilian, Paraguayan, Honduran and Costa Rican troops as part of the Interamerican Pacification Force (FIP), deployed under the aegis of the Organization of American States (OAS). The guard's domestic power, however, gradually broadened to embrace not only its original internal security and police functions but also control over customs, telecommunications, port facilities, radio broadcasting, the merchant marine, and civil aviation. Even as trusted friends of the family succeeded Luis in the presidency, his brother remained firmly in control of the National Guard. Eventually, in 1967, Anastasio himself was elected president; Luis soon died of a heart attack, leaving Anastasio in sole control. Without his brother's technocratic influence, Anastasio's corrupt ways were unrestrained. The 1972 Nicaragua earthquake, which severely damaged the capital of Managua, brought further evidence of corruption, as members of the National Guard openly looted damaged businesses and misappropriated international aid, and Somoza Debayle's personal wealth soared during the reconstruction period. In 1974, the growing Sandinista movement FSLN (named after the assassinated Sandino) succeeded in forcing the government to accept an amnesty, after which Somoza Debayle declared a state of siege and the National Guard