<human>:  When did the Bay of Pigs invasion take place?
<bot>: The Bay of Pigs invasion took place on April 17, 1961. The Bay of Pigs is a small island in the Caribbean Sea, off the coast of Cuba. In 1961, the CIA organized a secret invasion of the island by Cuban exiles, with the intention of deposing the Cuban leader Fidel Castro. The plan was a failure, and the invasion was a humiliating defeat for the United States.