Indian technicians from Tata Power and the Indian Border Security Force assemble an Israeli-made surveillance Aerostat Balloon in Ahmedabad on July 13, 2018. (Sam Panthaky/AFP via Getty Images)BAE Systems Hawks from the British Royal Air Force aerobatic team, the Red Arrows, perform at the Royal International Air Tattoo at RAF Fairford, England, on July 13, 2018. (Matt Cardy/Getty Images)Two Couteau Delta Mirage 2000Ds perform at the Royal International Air Tattoo at RAF Fairford, England, on July 13, 2018. (Matt Cardy/Getty Images)A soldier mounted on a U.K. Army Mobility Weapon-Mounted Installation Kit “Jackal” with the 1st The Queen's Dragoon Guards fires at a notional enemy during a lethality exercise with the Battle Group Poland at Orzysz, Poland, on July 14, 2018. (Spc. Hubert D. Delany III/U.S. Army)A C-135 leads a formation of four Rafale B military jets as they fly over the Champs-Elysees Avenue during the annual Bastille Day military parade in Paris on July 14, 2018. (Ludovic Marin/AFP via Getty Images)Sailors aboard the Arleigh Burke-class guided-missile destroyer Porter heave mooring line as the U.S. Navy ship departs Odessa, Ukraine, for the at-sea portion of exercise Sea Breeze, a U.S. and Ukraine co-hosted multinational maritime exercise held in the Black Sea. (MC1 Ryan Riley/U.S. Navy)A General Atomics Aeronautical Systems SkyGuardian drone arrives at RAF Fairford, England, after completing the first trans-Atlantic flight for such an aircraft on July 11, 2018. (Matt Cardy/Getty Images)Marines assigned to Special Purpose Marine Air-Ground Task Force—Crisis Africa, Logistics Combat Element 18.2 raise a radio antenna at Naval Air Station Sigonella, on July 11, 2018. (Cpl. Taylor W. Cooper/U.S. Marine Corps)Members of the public pose next to a mobile artillery weapon during a display titled "The French meet their armies" on the sidelines of the annual Bastille Day military parade on the Champs-Elysees avenue in Paris on July 14, 2018. (Jacques Demarthon/AFP via Getty Images)Airmen put a sticker on a C-130 at the Farnborough Airshow in England on July 16, 2018. (Matt Dunham/AP)Members of the 1st Division ride in their vehicles during the annual Bastille Day military parade on the Champs-Elysees avenue in Paris on July 14, 2018. (Ludovic Marin/AFP via Getty Images)Drones of the 61st Artillery Regiment are on display during the annual Bastille Day military parade on the Champs-Elysees avenue in Paris on July 14, 2018. (Ludovic Marin/AFP via Getty Images)A newly arrived light-attack Super Tucano lands after an air show during the presentation ceremony at the military air base in Bamako, Mali, on July 11, 2018. (Michele Cattani/AFP via Getty Images)A Ukrainian Ka-27 helicopter takes off from the Blue Ridge-class command-and-control ship Mount Whitney in the Black Sea during exercise Sea Breeze. The U.S. Navy ship was participating in the drill designed to enhance interoperability of the U.S. and Ukraine. (MC1 Justin Stumberg/U.S. Navy)