Jailed Kremlin critic Alexei Navalny goes on trial on "extremism" charges that could see his prison time extended for decades as part of a wider efforts to silence dissent. The case comes more than a year into Russia's large-scale offensive in Ukraine, which ushered in a wave of legal proceedings against government critics, with many now in exile or in jail. An AFP journalist at the maximum security IK-6 penal colony, where the 47-year-old veteran opponent of Russian President Vladimir Putin is being held, reported that proceedings were underway. IMAGES