It's also well remembered that Cubana flight 455 was terror-bombed in October, 1976 by former CIA agent Luis Posada Carriles that killed the 73 people on board. The plot was likely masterminded by Orlando Bosch who devoted his life to committing terrorist attacks against Cuba and trying to kill Fidel Castro.
Now at age 80, he lives near Miami and was recently interviewed by Andy Robinson of La Vanguardia. He told Mr. Robinson he once nearly succeeded in killing Castro in 1971 in Chile (with a pistol hidden in a camera), but the assassins sent there to do it "chickened out and didn't shoot" even though they were standing meters away from the Cuban leader and easily could have done it.
Posada, too, was frank in at least one interview he gave to the New York Times. He said "The CIA taught us everything... explosives, how to kill, bomb, trained us in acts of sabotage." Posada, like Bosch, spent 40 years trying to overthrow the Castro government forcibly and was personally responsible for many acts of violence over that period. In April,
2005 he sought political asylum in the US, apparently won't get it as the Bush administration is seeking a "friendly" country to extradite him to while ignoring requests for extradition by Cuba and Venezuela to face charges of terrorism in both countries. Posada was also likely responsible for other terror-bombings of hotels later in the 1990s to destroy the Cuban tourist industry with the help of CIA financing to do it.
It's also well known that CIA trained US based paramilitary groups like Alpha 66 and Brothers to the Rescue in Florida are free to operate from here where they're regarded as heros among Cuban reactionaries.
They have no fear of prosecution or extradition to Cuba for their crimes against the island state.