TODAY: Pussy Riot prisoner disappeared? Greenpeace activists share tales of harsh conditions; Navalny backs nationalist march; diplomatic relations with the former Soviet Union, Japan; Snowden not at Vkontakte; Putin toughens anti-terror measures; potash demand to increase thanks to low prices.

Pyotr Verzilov, the husband of jailed Pussy Riot member Nadezhda Tolokonnikova, says his wife has effectively disappeared, as he has not heard any news of her condition or location since she left her penal colony in Mordovia two weeks ago.  The prison service says she has simply been sent to a different penal colony, and that her family will be notified.  One of the jailed Greenpeace activists, currently being held in Murmansk, has spoken out about the miseries of prison life, saying there would be outrage in his home country if prisoners were kept in similar conditions.  The 30 total Greenpeace activists are expected to be moved to St. Petersburg.  Who would be a protester, asks The Guardian.  The Financial Times reports on the worrying trend towards nationalism and xenophobia in Russia – phenomena which are becoming ‘not the preserve of a few extremists but are turning rapidly into a leading mainstream concern’.  The Times says that former backers of opposition leader Alexei Navalny are ‘reassessing their support’ after he publicly backed the Unity Day march which is to be held today, expressing a wish to make nationalism ‘more respectable and mainstream’.  The FT’s angle is that Navalny’s endorsement of the Unity Day march was more of a preventative tactic – ‘in order not to leave it to the radicals’.