When Nikita Khrushchev wants to be taken at full seriousness, he does not merely pop off at a diplomatic reception, he solemnly reads what he has to say.Last week, before 15,000 people gathered for a Russian-Polish friendship rally in Moscow's new Sports Palace, Khrushchev opened up what is obviously Russia's winter offensive in foreign policy. In a first hasty reading, the world took him to mean a new hot time in Berlin
