The French decision to join EURATOM was conditioned on the regional agency not impinging on national nuclear programs. As early as 1955, French Prime Minister Guy Mollet had instructed French negotiators that “Euratom will not be an obstacle toward the possible decision of France … to build nuclear weapons.” While EURATOM’s jurisdiction would be limited to negotiating purchases of fissile materials, promoting trade with the United States and the United Kingdom, and exchanging reactors designs and civilian technology among members of the Atlantic community, Couve de Murville credited EURATOM with a fringe benefit: monitoring West Germany. In this spring 1960 letter to Prime Minister Michel Debré about revising the treaty, he warned against the removal of EURATOM controls over raw uranium and thorium or enriched uranium. Their removal, he cautioned, would create a dilemma: “either abandon the idea that German’s renunciation of atomic armaments could be enforced or support the enforcement of equivalent controls under the West European Union, which … would interfere in the direction of our programs and the development of our nuclear weapons.”