[fintstone]

I guess I would plan based on weather. Arlington is outdoors. Do the Smithsonian, Library of Congress, or National Art Gallery if it is raining.

Last time I was at Arlington was on 9/11. I was at the Pentagon on the subway (used to be able to get off underneath and walk right in). The plane hit and you could not get out there so I got off at Arlington and walked through the cemetery down to the burning building to help.