For example, Article 4 of the Non-Proliferation Treaty promises that, in exchange for signing the treaty and thus forswearing nuclear weapons, signateurs will receive assistance in developing, exchanging information about, or receiving the economic fruits of, peaceful nuclear technology. In a more pertinent example still, in that ultimate nuclear crisis of October 1962, President John F. Kennedy got Soviet Premier Nikita Khrushchev to pull his nuclear missiles out of Cuba, in part by pledging not to invade the island and (secretly) by withdrawing U.S. nuclear missiles from Turkey. Was Kennedy succumbing to Khrushchev's blackmail? To some degree, yes. Was he smart to do so? Absolutely yes.