(FILES) — A file photo taken on September 14, 2004, shows Alexander Litvinenko (L), a former Russian intelligence agent, speaking at a press conference in London. Russian President Vladimir Putin “probably approved” the radiation poisoning of former KGB agent Alexander Litvinenko in London, a British judge said January 21, 2016, at the conclusion of a public inquiry into his agonising death. AFP PHOTO / MARTIN HAYHOW / AFP / MARTIN HAYHOW