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.
The more than 250-mile, $6 billion railway is set to cut through the northern part of Laos and is primarily financed and built by the Chinese. So far, the project has mostly employed Chinese workers.
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.
President Rodrigo Duterte called Boracay island a "cesspool." It draws 2 million visitors a year but isn't equipped to accommodate them. Residents agree there's a problem, but worry about losing jobs.