We've seen some very strange (at least to me) approaches to DCA this afternoon (Friday).
Some of the planes are going well south of the Potomac, and flying quite low over Rosslyn (just west of DC across the river). A few have gone south of the twin towers at low altitudes, which is very unusual.
Another plane (sorry, no ID) came in very low and had to go around. I don't know if the low altitude had anything to do with going around.
Most of the people in the office are nervous about it. I've told them everything will be ok, but I think they're about ready to stage a mass exodous.