According to The Washington Post, John Walker was flown into Dulles Airport tonight before being helicoptered to the jail in Alexandria, Virginia.

Reston is only a few miles from Dulles, and the main road from the airport into Washington runs right through the middle of town. When I went to pick up Nicole from work, I noticed a whole lot of cars with very unofficial-looking laser-printed signs reading “Official Traffic Survey” posted in their windows parked up on the grass near the airport road and at all nearby intersections; there was even one in front of AOL. This isn’t unheard of, but actual Fairfax County traffic surveys tend to be conducted by a single guy in a single old truck — I mean, we all know the traffic is awful without conducting a “survey” at all — not young guys in suits occupying a dozen late-model Crown Victorias bristling with antennas. The (marked) police were also out in force, and there was at least one van with D.C. plates and a TV camera on a tall pole watching the airport road.

Possibly this was part of the backup plan in case the helicopter broke down.