Falls Church - from a 2001 article
"....In a part of Falls Church known to many as Little Mecca, the streets are lined with Arabic grocery stores, coffee houses and restaurants. At nearby J.E.B. Stuart High School, Muslims make up 12 percent of the student body. The streets of this tightly knit Muslim community are also home to the offices of professionals -- doctors, lawyers, technology consultants, managers -- who often gather together for evening prayers...."
I lived about 2 miles from there in the early to mid 90's. Didn't seem to be anything out of the ordinary then..