What else is based in Langley, VA

I know that the CIA is based there, but WHAT ELSE is based there? I know there is something but I can't remember. It could be a company or an organization or an agency, government or otherwise. Anyone know? Thanks!

The headquarters of the Federal Highway Administration.

There's also a Langley Air Force Base but it's not in Langley VA

http://en.wikipedia.org/wiki/Langley,_Vi…