
Aircraft leave a trail of smoke at the Experimental Aircraft Association (EAA) "AirVenture 2021" in Oshkosh, Wisconsin, the United States, July 30, 2021. The EAA AirVenture, an annual air show that gathering aviation enthusiasts, is ongoing from July 26 to Aug. 1, 2021.Photo:Xinhua

The aircraft flies sideways and diagonal to the ground at the Experimental Aircraft Association (EAA) "AirVenture 2021" in Oshkosh, Wisconsin, the United States, July 30, 2021. The EAA AirVenture, an annual air show that gathering aviation enthusiasts, is ongoing from July 26 to Aug. 1, 2021.Photo:Xinhua

A man takes photos at the Experimental Aircraft Association (EAA) "AirVenture 2021" in Oshkosh, Wisconsin, the United States, July 30, 2021. The EAA AirVenture, an annual air show that gathering aviation enthusiasts, is ongoing from July 26 to Aug. 1, 2021.Photo:Xinhua

A girl takes photos at the Experimental Aircraft Association (EAA) "AirVenture 2021" in Oshkosh, Wisconsin, the United States, July 30, 2021. The EAA AirVenture, an annual air show that gathering aviation enthusiasts, is ongoing from July 26 to Aug. 1, 2021.Photo:Xinhua

An aircraft performs at the Experimental Aircraft Association (EAA) "AirVenture 2021" in Oshkosh, Wisconsin, the United States, July 30, 2021. The EAA AirVenture, an annual air show that gathers aviation enthusiasts, is ongoing from July 26 to Aug. 1, 2021.Photo:Xinhua

Members of an aerobatic team perform at the Experimental Aircraft Association (EAA) "AirVenture 2021" in Oshkosh, Wisconsin, the United States, July 30, 2021. The EAA AirVenture, an annual air show that gathers aviation enthusiasts, is ongoing from July 26 to Aug. 1, 2021.Photo:Xinhua