For a couple of months, I’ve been wondering what in the heck is being built just south of the Pentagon, right off the freeway. It looks like the Arch in St. Louis, but pulled apart. I figured that it was some kind of 9/11 memorial because it’s right below the path of Flight 77. Turns out it has nothing to do with that: It’s an Air Force Memorial, and anybody driving on I-395 will see it. This will become one of the most recognizable memorials in the region, partly because so many people will see it from their cars, partly because it’s so distinctive. Wash Post story here.