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Some of the subcategories seem to be incorrect. For example, according to the featured List of areas in the National Park System of the United States there are no national parks in Washington, D.C. nor in the state of Maryland. Yet there are subcategories National parks in Washington, D.C. and National parks in Maryland which include not national parks, but instead protected areas (units) of NPS. As a novice, I am hesitant to mess with categories, but it seems that something needs to be fixed. Qblik 20:19, 5 April 2007 (UTC)[reply]