assassination attempt at his home prompts Michael to suddenly depart after confiding in consigliere Tom Hagen that he suspects a traitor within the family. Michael suspects Roth planned the assassination, but falsely tells Roth he suspects Pentangeli. In New York City, under Michael's instructions, Pentangeli attempts to make peace with the Rosatos, but they try to kill him. The attempt fails when a police officer enters the bar where the Rosatos are trying to kill Pentangeli, resulting in the Rosatos fleeing and a brief street shootout where Corleone soldier Willie Cicci is wounded. In Nevada, Tom Hagen is called to a Carson City brothel run by Michael's older brother Fredo, where Geary has been implicated in the death of a prostitute. Unaware that Michael arranged the "problem," Geary accepts Tom's offer to take care of it in return for Geary's political support. A sickly Roth, Michael, and several of their partners travel to Havana to discuss their future Cuban business prospects under the cooperative government of Fulgencio Batista. Michael becomes reluctant to continue operating in Cuba given the ongoing Cuban Revolution. On New Year's Eve, Fredo pretends not to know Johnny Ola, Roth's right-hand man, but later inadvertently reveals they know each other, leading Michael to realize that Fredo is the traitor. Michael orders hits on Ola and Roth; his enforcer strangles Ola with a coat hanger but is killed by Cuban soldiers as he tries to smother Roth. Batista abdicates due to rebel advances. During the ensuing chaos, Michael, Fredo, and Roth separately escape Cuba. Back home, Michael is told that his wife Kay has miscarried. In Washington, D.C., a Senate committee on organized crime is investigating the Corleone family, but Geary staunchly defends them. Pentangeli agrees to testify against Michael, who he believes had betrayed him to the Rosatos, and is placed under witness protection. On returning to Nevada, Fredo tells Michael that he did not know that Roth had intended to kill him, but that he resents being regarded as stupid by the family and feels that he should have taken over the family after their father's death. Michael disowns Fredo, but gives orders that he is not to be harmed while their mother is alive. Michael sends for Pentangeli's brother from Sicily, and Pentangeli, after seeing his brother in the hearing room, retracts his previous statement indicting Michael in organized crime; the hearing dissolves in an