Since I moved to Washington, DC, I have obtained piece by piece of a massive jigsaw puzzle. No one bothered to explain the rules, or what the picture is supposed to look like when you’re finished with it, but that’s just not how things work here. Because I don’t believe that truth ought to be granted on a need-to-know basis, I have written about what I’ve uncovered. Perhaps enough of us will chip away at the Sphinx long enough to find the answers to the riddles it holds close to the vest. What follows is another one recently explained.