Adenauer reached an agreement for his "nuclear ambitions" with a NATO Military Committee in December 1956 that stipulated West German forces were to be "equipped for nuclear warfare". Concluding that the United States would eventually pull out of Western Europe, Adenauer pursued nuclear cooperation with other countries. The French government then proposed that France, West Germany and Italy jointly develop and produce nuclear weapons and delivery systems, and an agreement was signed in April 1958. With the ascendancy of Charles de Gaulle, the agreement for joint production and control was shelved indefinitely. President John F. Kennedy, an ardent foe of nuclear proliferation, considered sales of such weapons moot since "in the event of war the United States would, from the outset, be prepared to defend the Federal Republic." The physicists of the Max Planck Institute for Theoretical Physics at Göttingen and other renowned universities would have had the scientific capability for in-house development, but the will was absent, nor was there public support. With Adenauer's fourth-term election in November 1961 and the end of his chancellorship in sight, his "nuclear ambitions" began to taper off.