Tianjin North news: coming on September 9 to 13, held in the airport economic zone in the third session of the China Tianjin Heli Expo, Continental Airlines "wind and thunder" performance team for the general public bring armed helicopter flight the highest degree of difficulty of the flight performance. On July 29, the reporters came to army aviation unit training base, visit the third session of the Tianjin naohiro "wind and thunder" aerobatic team training. In the last session of Tianjin direct fair, the aviation "thunder" performance...