Churchill Bids Farewell to Guests . Prime Minister , Sir Winston Churchill ( right ) shakes hands with the new American Secretary of State , Mr John Foster Dulles , after the latter had lunched with him at No 10 Downing Street . Standing centre is Mr Harold Stassen , director of the Mutual Security Agency , who is accompanying Mr Dulles on his fact finding tour of Europe . Before and after lunch the American visitors had talks with British Foreign Minister , Anthony Eden at the Foreign Office . 4 February 1953