...changed and evolved since its 1979 inscription in
terms of the ‘lessons’ it teaches. Since Tuol Sleng began operating as a memorial museum in 1979, and Choeung Ek in 1981, they have continued to evolve and change. Re
searchers continue to uncover new materials from the regime – from new forensic examinations of the bones at Choeung Ek, to graffiti on the walls at S-21/Tuol Sleng, to archaeological findings at M-13 – which drives re
search that advances understandings of the reasons for and the mechanics of an atrocity. Similarly, as memorial...