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The blast door of the November-33 launch facility, which once protected a Minuteman intercontinental ballistic missile and is now owned by the North Dakota Historic Society, is seen at dusk in Cooperstown, North Dakota, USA, 23 March 2015. The missile was removed to comply with the terms of the Strategic Arms Reduction Treaty, signed in 1991 by US President George H. W. Bush and Soviet leader Michael Gorbachev.