Killer chief up in court; GENOCIDE.
Ieng Thirith, 76, was Cambodia's social welfare minister and prosecutors say she must have known tens of thousands were dying.
Ieng - former leader Pol Pot's sister-in-law - appeared before the UN-backed tribunal in the capital Phnom Penh and requested bail.
Her British lawyer Diana Ellis said her client was ill and therefore not a flight risk.
Ieng denies the charges of "crimes against humanity".