PHNOM PENH, CAMBODIA (AP) - The man who ran the Khmer Rouge's notorious S-21 prison in Cambodia accepted responsibility Tuesday for torturing and executing thousands of inmates and expressed "heartfelt sorrow" for his crimes. Kaing Guek Eav (pronounced "Gang Geck Ee-uu"), better known as Duch ("Doik"), told the U.N.-backed genocide tribunal he wanted to apologize for his actions under the Khmer Rouge, whose radical policies while in power from 1975 to 1979 left an estimated 1.7 million Cambodians dead. Duch, 66, who commanded the group's main S-21 prison, accepted responsibility for the crimes committed there, "especially the torture and execution...