Washington DC is considered a national symbol because of all the reach history surrounding the capital. From the architecture to the events that happened there, DC is historical.
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Washington DC is the United States (national) Capital. That's what the symbol stands for
Because it stands for America's unity and democratic tradition.
Washington, DC
Washington, D.C., is a symbol of the country because it is the capital of the country.
a star
a star
Washington, D.C.
Washington is not a nation. Therefore it does not have a national anthem.
Washington DC is the United States Capital where the whithoue is located and where many memorials are.
The national government is located in Washington DC