A court in Cambodia on Thursday ordered a new investigation and postponed a verdict in the espionage trial of two journalists who had worked for a US government-backed radio station.Uon Chhin and Yeang Sothearin were arrested in November 2017 during a crackdown on opponents of Prime Minister Hun Sen’s government. They were charged with undermining national security by supplying information to a foreign state, an act punishable by up to 15 years’ imprisonment.Judge Im Vannak of the Phnom Penh…