Philip Agee, a former CIA agent who exposed its undercover operations in Latin America in a 1975 book, died in Havana ... on Monday night. Agee worked for the CIA for 12 years in Washington, Ecuador, Uruguay and Mexico. He resigned in 1968 in disagreement with U.S. support for military dictatorships in Latin America and became one of the first to blow the whistle on the CIA's activities around the world. His expos Inside the Company: CIA Diary revealed the names of dozens of agents working undercover in Latin America and elsewhere in the world. It was published in 27 languages. The CIA declined to comment on his death. Florida-born Agee said working as a case officer in South America opened his eyes to the CIA's ... goal in the region: to prop up traditional elites against perceived leftist threats through political repression and torture. "It was a time in the '70s when the worst imaginable horrors were going on in Latin America -- Argentina, Brazil, Chile, Uruguay, Paraguay, Guatemala, El Salvador -- they were military dictatorships with death squads, all with the backing of the CIA and the U.S. government," he told the British newspaper The Guardian in an interview published last year. "That was what motivated me to name all the names and work with journalists who were interested in knowing just who the CIA were in their countries," he said. Barbara Bush, the wife of former U.S. President George H.W. Bush, who was CIA director in 1976, blamed Agee in her memoirs for the murder of the Athens station chief, Richard Welch, in 1975. Agee denied any connection and sued her for $4 million, forcing her to revise the book to settle the libel case. In his autobiography On the Run, Agee detailed how he was hounded from five NATO countries, including the Netherlands, France and West Germany, after incurring the CIA's wrath.