In the historic heart of Riga, Latvia’s lively capital, there is a building that reveals why the Baltic States remain so wary of the Russian Bear. From the street, it doesn’t look like much – just another apartment block on a busy boulevard full of shops and cafes. Only the discreet sign outside gives the game away: ‘During the Soviet occupation the KGB imprisoned, tortured, killed and morally humiliated its victims in this building.’