rachel harvey is there. >> bearing witness to history. they gathered together outside the courtroom to hear a verdict long underdo -- overdue. the young are urged not to forget. comrade duch ran at the attention -- the detention center. under his orders, many were killed in the killing fields. he has been convicted of crimes against humanity. >> 35 years of imprisonment. >> but with time served, that is reduced to 19 years. a disappointment to many here. >> you have an man who is responsible for at least 13,000 lives. he is serving only 19 years. it comes down to a serving of 11.5 hours per like he took. that is not comprehensible or acceptable. >> the khmer rouge ruled cambodia for four years under the dictator pol pot. his extreme communists vision abolished religion, school, and money. some were murdered. others died of starvation. the khmer rouge was overthrown by vietnam in 1979. those of the khmer rouge considered enemies of the state ended up here. now is a museum. tiny, bare cells, left as they were found. testimony to the horrors