Trainees jog at the Guanghan campus of Civil Aviation Flight University of China in Deyang, Southwest China's Sichuan province, Aug 20, 2016. [Photo/chinanews.com]

Aviation security officers, also known as flight security officers, are responsible for guarding safety of persons on board a civilian aircraft. To become an aviation security officer is not easy. After a preliminary training for two and a half months, applicants must have at least 100-hour training on real planes. Despite the tough test, many young people want to choose this as their career.