Adenauer was deeply shocked by the Soviet threat of nuclear strikes against Britain and France, and even more so by the apparent quiescent American response to the Soviet threat of nuclear annihilation against two of NATO's key members. As a result, Adenauer became more interested in the French idea of a European "Third Force" in the Cold War as an alternative security policy. This helped to lead to the formation of the European Economic Community in 1957, which was intended to be the foundation stone of the European "Third Force".