Military transport helicopters fly over the Church of St George the Great Martyr as part of events held at the Ryazan Higher Airborne Command School to celebrate its 100th birthday in Moscow, Russia on November 12, 2018. (Photo by Alexander Ryumin/TASS)





U.S. Navy sailors perform checks on an F/A-18 fighter jet as another F/A-18 prepares to land on the USS Harry S. Truman aircraft carrier in the eastern Mediterranean Sea, May 4, 2018. (Photo by Alkis Konstantinidis/Reuters)





In this file photo taken on Friday, September 12, 2008, Russia's strategic bomber Tu-160 or White Swan, the largest supersonic bomber in the world, lands at Engels Air Base near Saratov, about 700 kilometers (450 miles) southeast of Moscow, Russia. The Russian military says two of its nuclear-capable strategic bombers have arrived in Venezuela, a deployment that comes amid soaring Russia-U.S. tensions. (Photo by Misha Japaridze/AP Photo)





Italian Air Force aerobatic team performs in Kuwait City on November 18, 2018, as part of the celebration of the Italian week in Kuwait. (Photo by Giuseppe Cacace/AFP Photo)





Ukrainian Mi-24 helicopters serving with the UN mission in Beni, Democratic Republic of the Congo on October 24, 2018/ (Photo by Oleksandr Klymenko/Reuters)





Italian Airforce Frecce Tricolori acrobatic team perform before the start of second run of a men's World Cup Giant Slalom, in Alta Badia, Italy, Sunday, December 16, 2018. (Photo by Andrea Solero/ANSA via AP Photo)





Sukhoi Su-30SM jet fighters of the Russkiye Vityazi (Russian Knights) aerobatic team perform during a demonstration flight in Krasnoyarsk, Russia October 6, 2018. (Photo by Ilya Naymushin/Reuters)





A Swiss Air Force Super Puma Cougar helicopter releases flares during a flight demonstration over the Axalp in the Bernese Oberland, Switzerland on October 10, 2018. (Photo by Arnd Wiegmann/Reuters)





A J-10B fighter jet of Chinese People's Liberation Army Air Force performs during the China International Aviation and Aerospace Exhibition, in Zhuhai, Guangdong province, China. (Photo by Reuters/China Stringer Network)





A French Navy Rafale fighter jet is seen aboard the upgraded aircraft carrier Charles de Gaulle, off the coast of Toulon, France, November 14, 2018. Europe's only nuclear-powered aircraft carrier, the 260-meter-long (850-ft) vessel, which carries 1,700 personnel and whose tonnage is equal to four Eiffel Towers, is due to be deployed in early February 2019 in the Indian Ocean, according to military sources. (Photo by Christophe Simon/Reuters)





Servicemen of the Ukrainian Air Assault Forces take part in military drills near Zhytomyr, Ukraine November 21, 2018. (Photo by Gleb Garanich/Reuters)





A handout photo made available by the US Air Force shows a US Air Force F-16 Fighting Falcon assigned to the 480th Expeditionary Fighter Squadron being de-iced in preparation of the NATO military exercise Trident Juncture 18, at Kallax Air Base, Sweden, 24 October 2018. According to reports, some 50,000 participants from over 30 nations are expected to take part in the NATO-led military exercise in Norway from 25 October to 23 November 2018. (Photo by Lt Casey D. Rodriguez/EPA/EFE)





A F/A-18 Hornet fighter aircraft flies over spertators during the annual live fire event of the Swiss Air Force at the Axalp, over Brienz in the Bernese Alps on October 10, 2018. At an altitude of 2,200 meters above sea level, spectators attended a unique aviation display performed at the highest air force firing range in Europe. (Photo by Fabrice Coffrini/AFP Photo)





The moon is pictured as a Norwegian F-16 flys during a Joint demonstration of the NATO Trident Juncture 2018 exercise, in Byneset near Trondheim, Norway, October 30, 2018. Trident Juncture 2018, is a NATO-led military exercise held in Norway from 25 October to 7 November 2018. The exercise is the largest of its kind in Norway since the 1980s. Around 50,000 participants from NATO and partner countries, some 250 aircraft, 65 ships and up to 10,000 vehicles take part in the exercise. The main goal of Trident Juncture is allegedly to train the NATO Response Force and to test the alliance's defence capability. (Photo by Jonathan Nackstrand/AFP Photo)





An RAF F-35B Lightning, a USAF F-15E Strike Eagle and a French Rafale fly over The English Channel in formation during the “Point Blank” exercise, after taking off from RAF Mildenhall, Britain, November 27, 2018. The French Air Force Rafale joined the exercise which has, until now, only included U.S. and RAF aircraft. (Photo by Eddie Keogh/Reuters)





An F/A-18E Super Hornet launches from the U.S. Navy aircraft carrier USS Harry S. Truman in support of Exercise Trident Juncture 18 in the Norwegian Sea October 25, 2018. (Photo by U.S. Navy/Mass Communication Specialist 3rd Class Adelola Tinubu/Handout via Reuters)





F-5 Tiger jets of the Patrouille Suisse perform during a flight show of the Swiss Air Force in Axalp near Meiringen, Switzerland, 10 October 2018. (Photo by Marcel Bieri/EPA/EFE)