The Canadian Forces Snowbirds perform during the 2018 Canadian International Air Show in Toronto, Canada, Sept. 1, 2018. The annual three-day event kicked off on Saturday to draw thousands of spectators. (Xinhua/Zou Zheng)

The Canadian Forces Snowbirds perform during the 2018 Canadian International Air Show in Toronto, Canada, Sept. 1, 2018. The annual three-day event kicked off on Saturday to draw thousands of spectators. (Xinhua/Zou Zheng)

An F-35 jet fighter (R) performs with a P51 Mustang during the 2018 Canadian International Air Show in Toronto, Canada, Sept. 1, 2018. The annual three-day event kicked off on Saturday to draw thousands of spectators. (Xinhua/Zou Zheng)

The United States Air Force Thunderbirds perform during the 2018 Canadian International Air Show in Toronto, Canada, Sept. 1, 2018. The annual three-day event kicked off on Saturday to draw thousands of spectators. (Xinhua/Zou Zheng)

The United States Air Force Thunderbirds perform during the 2018 Canadian International Air Show in Toronto, Canada, Sept. 1, 2018. The annual three-day event kicked off on Saturday to draw thousands of spectators. (Xinhua/Zou Zheng)

The Canadian Forces Snowbirds perform during the 2018 Canadian International Air Show in Toronto, Canada, Sept. 1, 2018. The annual three-day event kicked off on Saturday to draw thousands of spectators. (Xinhua/Zou Zheng)