Soviet Embassy's 'Summer Camp' House

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There were NEVER black helicopters, the paint scheme simply didn’t exist on any of the helicopter squadrons based in the National Capital Area with a mission to assist in evacuation of the National Command Authority. The closest would have been blue (later grey) from 1st HS at Andrews AFB, or green from those assigned to Ft Belvoir or MCS Quantico.

"It’s unclear when the Soviets left . . . " ???
I thought it would be very very easy to determine that, by looking at Virginia property/tax records, open to the public.

https://www.zillow.com/homedetails/445-Randleston-Ln-Bluemont-VA-20135/296348278_zpid/?