Did London and Washington Sell Out the Baltics to Stalin?

Moscow has decided to stir things up before next week's NATO summit in Riga. Russia has released declassified documents showing that the US and Britain secretly approved a Soviet occupation of the Baltics a full year before the Nazis invaded Russia.

Apparently the rationale was that the Baltics were necessary to form a buffer for Soviet defence against a German invasion.

The Guardian says the NDVK dossier contains documents likely provided by such British traitors as Kim Philby and Donald MacLean.

Moscow denies the timing of the release of these documents was intended to cause a rift at the NATO summit. No, not likely.