" t's a done deal, and one of the biggest residential real estate transactions ever in the District, says the listing agent for a Northwest Washington estate once owned by Rafiq Hariri, a billionaire Lebanese politician who was assassinated in February.Cathie Gill, principal of Cathie Gill Inc. Realtors in the District, said the 16.2-acre tract on Foxhall Road sold Sept. 30 for more than $21 million." (thanks Fadi)