Stencil graffiti spotted at 17th & R Sts., NW, Washington DC, April 30, 2015, 5:51 PM.
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Note: In a search of Google Images I could find only one other example of this particular stencil graffiti, here: https://www.flickr.com/photos/alexiares/2449433511/. The uploader of that photo didn’t indicate its location.