Index on Censorship looks back on the highs and lows of the year. Editors, journalists, artists and scholars on the frontline review the challenges for free speech around the world. Internationally acclaimed artist Ai Weiwei defies attempts to silence his blog and his protests; leading Russian editor. Dmitry Muratov speaks exclusively to Index about his fight for justice and Melissa Goodman asks why Barack Obama turned his back on transparency. Plus eyewitness accounts and analysis on Turkey, Burma, Sri Lanka, The Gambia, Zimbabwe and Iran.