Recent attacks on journalists in Russia are yet another reminder that investigating sensitive subjects, such as corruption, is risky. 3 journalists and an environmental activist have been targeted in recent weeks. One of the last independent newspapers, Novaya Gazeta - Anna Politkovskaya's paper - is threatened with closure. President Medvedev has vowed to punish those responsible and defend freedom of expression. But with 18 journalists' murders still unsolved, is it a promise he can keep?
Programme prepared by Kate Williams, Marie Billon and Patrick Lovett