Turns out the county is going to give the city the land on which Henderson and Mason reside as part of a deal to buy the FCC-owned water utility:
http://www.washingtonpost.com/local/va-politics/fairfax-county-falls-church-halt-water-war-with-tentative-40-million-sale-of-utility/2012/11/20/9f91bb72-3357-11e2-bfd5-e202b6d7b501_story.html
I agree FCC is kind of ugly, but at least it will have more control over its schools.