Bing found the following results
Washington, D.C. - Wikipedia
History of Washington, D.C. - Wikipedia
Washington, D.C. - Simple English Wikipedia, the free encyclopedia
Washington, D.C. - Wikiwand
Government of the District of Columbia - Wikipedia
Washington, D.C. | History, Map, Population, & Facts
Geography of Washington, D.C. - Wikipedia
Washington, D.C. - Capital, Founding, Monumental | Britannica
The History of Washington, DC | Washington DC
Washington, D.C. - Wikiwand