After Fidel Castro took control of Cuba in 1959, U.S.-based exile groups took responsibility for several attacks against the Caribbean nation, including the bombing of Cubana Flight 455 and the CIA-supported Bay of Pigs invasion. 

Because of these attacks, the Cuban government sent spies to operate in the U.S., which created a network known as “La Red Avispa” (or Wasp Network).

The Cuban Five were part of the Wasp Network, and according to reports, they infiltrated a number of Cuban-American groups including Alpha 66, the F4 Commandos, and Brothers to the Rescue. 

After two Brothers to the Rescue aircrafts were shot down by the Cuban military in 1996, killing four U.S. citizens, the Clinton administration cracked down and uncovered the spy network that included the Cuban Five. 

Source link