"Nikita Krushchev's eagerness to challenge U.S. interests around the world contributed to the spread of the Cold War in the Middle East, East Asia, Latin America, and even Africa. Krushchev's aggressiveness was motivated not only by a desire to take advantage of an opportunity to expand Soviet influence but also by the perceived Soviet need to fend off a growing challenge by China for leadership of the communist movement. Krushchev's willingness to engage the United States in a nuclear arms race was motivated primarily by his realization that the Soviet Union, despite the continuing development of its nuclear arsenal, was still vulnerable to an American nuclear strike. He undoubtedly believed that the best defense is a good offense and that a forward policy would conceal Soviet nuclear weakness while serving to pressure the West to resolve issues, such as Berlin, to the satisfaction of the Soviet Union. Krushchev's aggressiveness also made Soviet-American reconciliation impossible during the 1950s."