From March 20 through April 14, the Ryerson Image Centre in Toronto is exhibiting Gemma Warren’s Year Zero. A Prison With No Walls. This exhibition examines the effects of the Cambodian genocide, which happened from 1975 to 1979 under the rule of the Khmer Rouge. Warren examines the relationship between memory and the present through current images of landscapes where atrocities occurred during the genocide. The images are also accompanied by quotes from survivors, video and sound.