Some of the CIA's 600 Castro assassination attempts

Prior to his death, Fidel Castro was the subject of not one or two - and not a few dozen - but an estimated 600 assassination attempts by the US Central Intelligence Agency.

In addition to using sniper rifles and explosives, the CIA used exploding cigars, explosive baseballs, and firearms disguised as cameras, Garrett Tenney reported.

Some of the more complex attempts on Castro's life included a 1963 plan in which a poison pill was to be slipped into Castro's favorite type of milkshake at the Hilton Hotel in Havana, which was foiled when the pill froze in the hotel freezer.

The CIA also placed a giant conch shell filled with explosives in Castro's favorite diving spot, and prepared a poison-tainted wetsuit which the dictator never received.

FOX News has Castro's response and other details.

Analysis: Much uncertainty ahead in US-Cuba relationship