Relations between Cuba and the U.S. were further strained following the explosion of a French vessel, the La Coubre, in Havana harbor in March 1960. The ship carried weapons purchased from Belgium, and the cause of the explosion was never determined, but Castro publicly insinuated that the U.S. government was guilty of sabotage.
At the conclusion of his novitiate in the Society of Jesus, Bergoglio officially became a Jesuit on 12 March 1960, when he made the religious profession of the initial, perpetual vows of poverty, chastity and obedience of a member of the order.
On 17 March 1960, the CIA put forward their plan for the overthrow of Castro's administration to the U.S. National Security Council (NSC) where US President Dwight D. Eisenhower lended his support. The first stated objective of the plan was to "bring about the replacement of the Castro regime with one more devoted to the true interests of the Cuban people and more acceptable to the US in such a manner to avoid any appearance of US intervention."