In desperation, Castro almost begged Mikoyan to leave the tactical warheads in Cuba, especially because the Americans were not aware of them and they were not part of the agreement between Kennedy and Khrushchev. Castro claimed that the situation now was even worse than it was before the crisis -- Cuba was defenseless, and the U.S. non-invasion assurances did not mean much for the Cubans. But Mikoyan rejected Castro's pleas and cited a (nonexistent) Soviet law proscribing the transfer of nuclear weapons to third countries. Castro had a suggestion: "So you have a law that prohibits transfer of tactical nuclear weapons to other countries? It's a pity. And when are you going to repeal that law?" Mikoyan was non-committal: "We will see. It is our right [to do so]."
This ended Cuba's hope to become a Latin American nuclear power.
Ironically, if the Cubans were a little more pliant, and a little less independent, if they were more willing to be Soviet pawns, they would have kept the tactical nuclear weapons on the island. But they showed themselves to be much more than just a parking lot for the Soviet missiles. Cuba was a major independent variable of the Cuban Missile Crisis. Mikoyan treated his Cuban hosts with great empathy and respect, while being highly critical of his own political and military leadership. He admired the genuine character of the Cuban revolution, he saw its appeal for Latin America. But he also saw the danger of the situation spiraling out of control probably better than other leaders in this tense triangle, and thus brought about the final resolution of the crisis.
The following transcript was prepared by a Soviet note-taker, with the Soviet ambassador to Cuba, Alexandr Alexeyev, translating for Mikoyan.Mikoyan Castro Memcon 11 22 62.PDF