Speech; Nixon Administration; Military posture of superiority as essential tool for negotiation with Soviets; Four spheres of political influence needed: Soviet, American, Western European, Asian; American involvement in Vietnam; Senator Mansfield's resolution of level of forces permanently stationed in Europe; NATO [North Atlantic Treaty Organization] defense obligations; Call for Western Europe to act more multilaterally in defense matters; Talks on strategic arms limitation (S.A.L.T.) with Soviet Union; Warsaw Pact bid for an early European Security Conference.