The leading Russian opposition politician Alexei Navalny is fighting for his life . His family and supporters say he was poisoned. Navalny fell ill during a flight to Moscow. His staff suspect poison was put in his tea at an airport cafe. But doctors have told his wife his condition is 'unstable' and he's 'too ill' to be transferred. Navalny's team says the hospital is blocking his move under pressure from the Kremlin. This is not the first time such an attack has occured. So, are Russian critcs now at risk more than ever? Presenter: Hashem Ahelbarra Guests: Anna Matveeva - Visiting Senior Research Fellow at King's College London. Daragh McDowell - Principal Russia Analyst at the risk consultancy Verisk Maplecroft. Ilya Ponomarev - Exiled Russian Politician and a former Member of the State Duma. - Subscribe to our channel: aje.io/AJSubscribe - Follow us on Twitter: twitter.com/AJEnglish - Find us on Facebook: www.facebook.com/aljazeera - Check our website: www.aljazeera.com/ #AlJazeeraEnglish #Russia #Poisoning