 Volume building on the outer loop in Alexandria at the Woodrow Wilson Bridge. Heavier traffic now on 495 at the American Legion Bridge. 66 uneventful. Maryland portions of the Beltway starting to bog down in the inner loop in Silver Spring and College Park. 270. No incidents reported up to Frederick. BW Parkway filling in near 32. Brief delays on Route 50 between Annapolis and the Bay Bridge. In the district, NATO summit closures continue around the Washington Convention Center.