Boris Berezovsky listens to questions du

Boris Berezovsky listens to questions during a press conference at the Euston Hilton hotel in London, 23 November 2007, on the first year anniversary of the death of former Russian spy Alexander Litvinenko. The widow of murdered former KGB agent Alexander Litvinenko vowed to uncover the truth about alleged Kremlin links to her husband's poisoning Friday, the first anniversary of his death in London. With tears in her eyes, Marina Litvinenko told reporters afterwards: "We need support, more official support, and I promise one day we definitely will know who is responsible for this because without this knowledge, we just cannot feel we're safe." AFP PHOTO/LEON NEAL (Photo credit should read Leon Neal/AFP via Getty Images)