The Lemass era saw some significant developments in Irish foreign policy. Frank Aiken served as Minister for External Affairs during the whole of Lemass's tenure as Taoiseach. At the United Nations Aiken took an independent stance and backed the admission of China to the organisation, in spite of huge protests from the United States. Admitted only in 1955, Ireland played a large role at the UN, serving on the Security Council in 1962, condemning Chinese aggression in Tibet and advocating nuclear arms limitation. One of the main areas of foreign policy which emerged during the Lemass years was a debate over Ireland's neutrality, a debate that has never been formally resolved, with the de facto policy being to avoid joining military engagements or alliances without neutrality as it's traditionally understood.