Tourists line up for check-in before departure at International Airport in Siem Reap province, Cambodia as it opened Thursday, Nov. 16, 2023. The new airport can handle 7 million passengers a year, with plans to augment it to handle 12 million passengers annually from 2040. It was constructed under a 55-year build-operate-transfer (BOT) program between Cambodia and China. (AP Photo/Heng Sinith)