FINALLY got to Arlington. I think as I was running around in the dark top-side, I was showing things on the map, but not really exploring them. I think I was just avoiding going back down in the tunnels that night. If you get to Falls Church, there is a short metro tunnel at Falls Church North. It looks like it is a dead end, but there is a bigger room with a couple Ghouls and there is a tunnel off to the back right of the room. Takes you right to Arlington.
Got the Luck bobblehead at Arlington house and shot up some Chinese ghouls at the food factory. Loaded up on some chinese assault rifles, so that was good. One of the bastards snuck up on me somehow, and startled me enough that I actually jumped off the couch a bit.
After that I hit up Canterbury Commons and took care of those two freaks. Added some caps to a couple of the traders to see if any of their wares would actually get better - never had done that before.