PLA's 'Thunder' aerobatic team debuts at China Helicopter Expo (3/8)

A pilot from the "Thunder" aerobatic team of the Chinese People's Liberation (PLA) Army Aviation gestures to the audience before flying during the 2nd China Helicopter Exposition in Tianjin, north China, Sept. 8, 2013. The team made its debut which lasted 25 minutes. (Xinhua/Yang Guang)