“The Russian Knights” an aerobatic demonstration team of the Russian Air Force, flying the Sukhoi Su-30SM fighter aircraft, perform during the Moscow International Aviation and Space Salon MAKS-2017 in the city of Zhukovsky, outside Moscow, 22 July 2017. The International Aviation and Space Salon MAKS 2017 take place from 18 to 23 July. (Photo by Sergei Ilnitsky/EPA)
