Make sure to read this B3 Washington Post story about the near total halt of migration to the outer suburbs of the D.C. metro area, if only for the rare spectacle of seeing a Brookings Institution scholar quoted as saying, “Wow!” The bottom line: “For the first time this decade, more residents left Prince William and Stafford counties in Virginia and Frederick County in Maryland for other counties than moved in.” That’s a pretty big deal, and one we expect all the local urbanist blogs to geek out over in due course.