While hundreds of Cambodians were granted permission to protest against Laos’s controversial Don Sahong dam…authorities in Kampong Cham weren’t very accommodating, activists and officials said…Four hundred activists made their way along the Mekong River by longboat through Kratie province’s Sambor district and Stung Treng province’s Thala Barivat district near the Cambodian-Lao border…in protest of the planned multimillion-dollar dam. But while they were allowed to pass peacefully through those provinces, protesters were denied entry in Kampong Cham…