 Complete the following phrase:  In August 1947 he was appointed Commonwealth Secretary in the Ministry of External Affairs, From 1952-54, he was Indias first ambassador to West Germany. He returned as Commonwealth Secretary in the Ministry of External Affairs 195455 and from 12 October 1955 to 11 April 1961 was the longest serving Foreign Secretary of India. As Commonwealth Secretary, along with V.K. Krishna Menon, Dutt was Indias representative on the Political Committee at the Bandung Conference. As Foreign Secretary in the years leading up to the Sino-Indian War of 1962, Dutt was closely involved in policy formulation regarding Tibet and China. He was also involved in shaping Indias response to the Suez and 