Diplomatic Receiving Line -- Invited guests pass along a diplomatic receiving line in San Francisco's Fairmont hotel, Sept.1 before a tri-partite amity pact dinner which celebrated the signing of a mutual defense pact by the United States, Australia and New Zealand. Greeting the guests are (right to left) Percy Spender, Australian Ambassador to the United States and Mrs. Spencer; Sir Carl Berendsen, Ambassador to the United States from New Zealand and. Mrs Berendsen, and Dean Acheson, United States Secretary of State and Mrs. Acheson. January 09, 1951. (Photo by Associated Press Photo).