There has been a figurative explosion of headscarves in Northern Virginia in the last ten years.
Fairfax County schools have gone from supporting Spanish language instruction, to supporting 22 foreign languages.
The All Dulles Area Muslim Society (http://www.adamscenter.org/ ) is a major Muslim Brotherhood front, as is the Islamic Society of North America, which has offices next to the US Capitol.
It is pretty much impossible for the many recent muslim immigrants to find a mosque in the area which is not a front for extremist organizations, as there were virtually none until these organizations started building them with Gulf Arab oil money.
They are factories for terrorists, and they are in a construction boom. Most of their product is still in the pipeline - a gusher to come..
I live in the hotbed, I know exactly what you mean. Merrifield has an outpost of the Saudi embassy.