Sam Rainsy of the now-banned Cambodia National Rescue Party was barred from boarding a plane from Paris to Thailand. His deputy was detained in Malaysia. Both risk arrest if they enter Cambodia.
He was seen as a chief architect of the regime's brutal collectivist policies that led to the deaths of some 1.7 million people. He was found guilty of war crimes by a U.N.-backed tribunal last year.
The chief ideologue of the Khmer Rouge, Nuon Chea, has died. He was the right-hand man to Pol Pot, who led a murderous regime in Cambodia in the late 1970s.
Many were granted refugee status after fleeing U.S. bombing during the Vietnam War and the massacres of the Khmer Rouge, and know little about the country where they're being forced to return.
Nuon Chea, 92, who was the No. 2 leader of the Khmer Rouge from 1975-1979 and Khieu Samphan, the 87-year-old former head of state of the brutal regime, were found guilty of genocide and other crimes.
Chinese companies are building infrastructure and dams along the vast river that runs through five Southeast Asian countries before emptying into the South China Sea.
This Sunday's elections have been declared a sham by rights groups and Cambodia's opposition leaders, who've called for a boycott. For longtime leader Hun Sen, they're about cementing his legacy.