Stalinist Memorial Site in Russia Destroyed, Nations Condemn
Poland, Estonia, Lithuania, Latvia protested on April 23.
Memorial opened in 1992 on a NKVD suspected mass grave.
Honors 1937-38 Great Terror victims (700K estimated).
Embassies sent joint letter to Russian Foreign Ministry, calling removal 'barbaric'.
Supreme Court ruled Memorial as 'extremist' movement.
Andrei Lugovoi requested investigation into Solovetsky Stone.
1 week ago