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This 22 April 1999 photograph displayed at the National Archives in Washington, DC, shows the original copy of the North Atlantic Treaty signed 04 April, 1949 by then US Secretary of State Dean Achison (Lower Right). The document on loan from the US Department of State will be displayed at the NATO summit, celebrating the 50th anniversary of NATO 23 April, 1999. (KEYSTONE/EPA/AFP/MARIO TAMA)