Obituary: Liu Xiaobo

Liu Xiaobo, a Nobel peace laureate who spent almost a quarter of his life behind bars in China for advocating human rights and democracy, has died at the age of 61.

Liu, a prominent dissident since the 1989 Tiananmen Square pro-democracy protests, died from multiple organ failure on Thursday, having not been allowed to leave the country for treatment for late-stage liver cancer.  Read more.