I think it was in the Uri Dan book on Lansky, Guineapig, but to tell the truth, a lot of this stuff isn't reliable--may be legend. What makes it possible is that Lansky allegedly sent money to both Castro and Batista, hedging his bets. The only undeniable facts are that Lansky got out of Cuba on his own but Trafficante was detained. Another story has it that the US Government asked Lansky to ask Batista to renounce his presidency of Cuba in 1943 and move to Florida--allegedly because the government thought he was a Communist! The most reliable book on Lansky is Robert Lacey's biography, "Little Man - Meyer Lansky and the Gangster Life."