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A few blocks north and slightly to the east of the Capitol in Washington, D.C., there is a post office. Around a quarter to midnight on April 15 this year, I happened to be walking by (don’t ask why). One thing, then another, grabbed my attention. The first was that traffic was heavy as I neared the intersection of 1st NE and Massachusetts Ave. Since the downtown office core of Washington goes into a deep, fitful sleep at night, traffic is an oddity.

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