In the final years of the Cold War, during a private walk with only Presidents Reagan and Gorbachev and their translators present, Reagan began with a question: If planet Earth were invaded by hostile Martians, how would the Soviet Union and the United States respond?20 Initially, the Russian interpreter misunderstood Reagan and his translation raised eyebrows: Was Reagan telling Gorbachev that Martians had just invaded Earth? After the confusion was cleared up, Reagan pursued the question. His purpose was to underline the core interests that otherwise deadly adversaries shared.

