In this May 17, 2015, photo, then Cambodian main opposition Cambodia National Rescue Party leader Sam Rainsy greets his supporters as he arrives at Choeung Ek memorial on the outskirts of Phnom Penh, Cambodia. A lawyer for Cambodia's military filed a lawsuit against the former opposition leader, a day after Prime Minister Hun Sen said he should be charged with treason. The lawyer says the complaint filed Thursday, Dec. 7, 2017, accuses Sam Rainsy of inciting the military to not follow orders, insulting military leaders and causing depression of the armed forces. (AP Photo/Heng Sinith)