135 university students and 6 teachers from Pour un Sourire d'Enfant observing trial in Case 002 against Ieng Sary, Nuon Chea and Khieu Samphan in the afternoon of 6 December 2012 when Mr. HUN Chhunly is testifying. Before comming to the court, the group visited Tuols Sleng Genocide Museum (former S-21 Security Center during KR era) and Cheung Ek memorial site in the morning as part of ECCC Study Tour organized by Public Affairs Section of ECCC.