Hualien Air-force Base is organizing national defense education activities during the summer, with an open house day.The most impressive activity will be the airshow by the Thunder Tighter team.A rehearsal was conducted this morning. 　　The skies over Hualien came alive with the roar of powerful jet engines.Four AT-3 jet trainers were flying above the air force base as the Thunder Tiger team conducted a rehearsal for the upcoming air show in the sky,one of the national defense education activities scheduled on July 17th. 　　Three fighter jets were flying in the formation of an arrow with a consort aircraft following behind.The four jet trainers flew around the base for four times to repeat verticle loop motion.These four models of AT-3 jet trainers were the first of its kind operated and manufactured by the Republic of China Air Force, efficient in ground-to-sea attack. 　　The prototype jet test flight was successful in 1980, which was an important milestone in the country's aviation and space industry.AT-3 fighter jets will also perform a stunning aerobatic motion to begin the show, something that was not seen in the rehearsal.The Thunder Tiger team promises to present an impressive show to audience on July 17th.