FILE - In this Aug. 16, 2015 file photo, Sam Rainsy, leader of the opposition Cambodia National Rescue Party (CNRP), waves from a car upon his arrival at Phnom Penh International Airport in Phnom Penh, Cambodia as hundreds of cheering supporters greeted him on his return from a trip abroad. The head of Cambodia's opposition party has announced his resignation from the group after the country's long-serving prime minister announced plans for a law that could lead to the party's dissolution. Rainsy announced his resignation Saturday, Feb. 11, 2017 in a letter to his Cambodia National Rescue Party.(AP Photo/Heng Sinith, File)
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