The younger sister of Fidel and Raul Castro, Juanita Castro, collaborated with the U.S. Central Intelligence Agency against her brothers' rule in Cuba before going into exile in Miami in 1964, she said on Sunday.Juanita Castro, 76, who has not spoken to either of her brothers for more than four decades, made the revelation to the Spanish-language TV channel Univision-Noticias 23 on the eve of the publication of her memoirs about Fidel and Raul Castro.The book in Spanish entitled "Fidel and Raul, My Brothers, the Secret History," co-written with Mexican journalist Maria Antonieta Collins, is being published on Mondayhttp://www.reuters.com/article/globalNews/idUSTRE59P0NK20091026
