Juanita Castro, one of the younger sisters of the revolutionary Cuban leaders Fidel and Raúl Castro, was initially active in her brothers’ struggle against the US-backed Batista regime. However, she turned against them soon after they came to power in 1959.
According to her 2009 memoir, Fidel and Raúl Mis Hermanos: La Historia Secreta, co-written with María Antonieta Collins, Juanita began to collaborate with the CIA from 1961, as it made attempts to overthrow the Castro regime.