Photos: Inside Moscow's Kaspersky Labs

On the outskirts of Moscow, Kaspersky Labs occupies four floors of an office which was once the headquarters for the development of Soviet nuclear missile guidance systems. Despite that it looks like any one of a hundred such 1960s tower blocks around the city.

Usually the drive from the centre of Moscow takes considerably longer but almost unprecedented temperatures in the capital of around -35°c mean the roads are empty as many cars have stopped working and people are staying indoors.

Photo: Will Sturgeon