11 April 2009. A points to:
9 April 2009
March 26, 2008 news account of the FBI spy house:
FBI camera behind skylight.
March 6, 2001 account of the FBI-NSA tunnel under the RU embassy:
Photos and captions below dated April 5, 2009, by Shepherd Johnson.
FBI Spy House Eyes Russian Embassy
The empty lot would be handy for supporting the tunneling operation.