Russian Roolettes perform at Wings Over Illawarra air show, at Albion Park Airport, 100 km south of Sydney, Australia, May 6, 2018. With over 80 aircraft on display both on the ground and in the sky, this year's program was the largest ever, with more than 40,000 people in attendance for the two day event on Saturday and Sunday. (Xinhua/Bai Xuefei)