Cuba's number three official today â Commander Juan Almeida â was secretly working with JFK in November 1963 to overthrow Fidel. The U.S. government recently revealed Almeida's work for JFK, allowing the updated trade paperback of Ultimate Sacrifice to tell the full story for the first time (complete with new photos and documents). The authors obtained the story from almost two dozen associates of John and Robert Kennedy, starting in 1990 with JFK's Secretary of State Dean Rusk. Their accounts are supported by thousands of newly-released files at the National Archives. Almeida's "palace coup," set for December 1, 1963, was to be backed up by U.S. forces "invited" in by Commander Almeida, then Chief of the Cuban Army. However, three Mafia bosses being targeted by Attorney General Robert F. Kennedy used several CIA assets to infiltrate the secret plot and murder JFK. This resulted in cover-ups by officials like RFK and LBJ, to prevent the exposure of Almeida and a possible nuclear confrontation with the Soviets. The new edition explains why Almeida was not a double agent, why Fidel suspected Almeida's ally Che Guevara, and what Fidel did in 1990 when he finally found out about Almeida's work for JFK.