German Air Force personnel are seen in front of an Israeli Air Force F-16 as part of the joint-exercise 'Blue Wings 2020' by the air forces of Germany and Israel at Noervenich air base in Noervenich, Germany, August 20, 2020. REUTERS/Leon Kuegeler 

German and Israeli air force personnel pose for a group picture in front of an Israeli Air Force F-16 plane and a German Air Force Eurofighter plane at a media event as part of the joint-exercise 'Blue Wings 2020' by the air forces of Germany and Israel at Noervenich air base in Noervenich, Germany, August 20, 2020. REUTERS/Leon Kuegeler 

Commuters wear protective masks as Indonesian airforce personnel enforce social restrictions at Sudirman train station in Jakarta, Indonesia, amid the coronavirus disease (COVID-19) outbreak, May 28, 2020. REUTERS/WIlly Kurniawan TPX IMAGES OF THE DAY 

Commuters wear protective masks as Indonesian airforce personnel enforce social restrictions at Sudirman train station in Jakarta, Indonesia, amid the coronavirus disease (COVID-19) outbreak, May 28, 2020. REUTERS/WIlly Kurniawan 

Indonesian airforce personnel prepare to enforce social restrictions amid the coronavirus disease (COVID-19) outbreak, at a train station in Jakarta, Indonesia, May 28, 2020. REUTERS/WIlly Kurniawan 

Indonesian airforce personnel take part in a large scale effort to enforce social restrictions amid the coronavirus disease (COVID-19) outbreak, at a train station in Jakarta, Indonesia, May 28, 2020. REUTERS/WIlly Kurniawan 

Indonesian airforce personnel prepare to enforce social restrictions amid the coronavirus disease (COVID-19) outbreak, at a train station in Jakarta, Indonesia, May 28, 2020. REUTERS/WIlly Kurniawan 

U.S air force personnel stand by an U.S. A-10 aircraft, one of a squadron that arrived at the Kandahar air base, Afghanistan January 23, 2018. REUTERS/Omar Sobhani 

U.S. military personnel pass in front of a U.S. A-10 aircraft, one of a squadron that has arrived to step up the fight against the Taliban, at the Kandahar air base, Afghanistan January 23, 2018. REUTERS/Omar Sobhani 

Taiwanese air force personnel and a mascot stand guard in front of a Sikorsky S-70 helicopter during a performance at Gangshan air force base in Kaohsiung, Taiwan August 7, 2017. REUTERS/Tyrone Siu 

Afghan Air Force medical personnel carry an injured member of the Afghan security forces off a C-130 military transport plane in Kabul, Afghanistan July 9, 2017. Picture taken on July 9, 2017. REUTERS/Omar Sobhani 

Afghan Air Force medical personnel help an injured member of the Afghan security forces to get off a C-130 military transport plane in Kabul, Afghanistan July 9, 2017. Picture taken on July 9, 2017. REUTERS/Omar Sobhani 

Afghan military medical personnel take an injured member of the Afghan security forces off an ambulance, prior to air transport for treatment in Kabul, at the Kandahar military Airport, Afghanistan July 9, 2017. Picture taken on July 9, 2017. REUTERS/Omar Sobhani 

Afghan Air Force medical personnel carry an injured member of the Afghan security forces off a C-130 military transport plane in Kabul, Afghanistan July 9, 2017. Picture taken on July 9, 2017. REUTERS/Omar Sobhani 

Afghan Air forces medical personnel carry an Injured member of the Afghan security forces onto a C-130 military transport plane, prior to transfer for treatment in Kabul, at the Kandahar military Airport, Afghanistan July 9, 2017. Picture taken on July 9, 2017. REUTERS/Omar Sobhani 

German Defence Minister Ursula von der Leyen watches German army Bundeswehr drone pilots during a visit to Camp Castor in Gao, Mali, December 19, 2016. REUTERS/Kay Nietfeld/Pool 

Italian air force personnel take pictures as Pope Francis leads his general audience in Paul VI Hall at the Vatican November 30, 2016. REUTERS/Alessandro Bianchi 

A Russian BMD armoured personnel carrier descends to the ground from an IL-76 transport plane during a joint Serbian-Russian military training exercise "Slavic Brotherhood" in the town of Kovin, near Belgrade, Serbia November 7, 2016. REUTERS/Marko Djurica 

A Russian BMD armoured personnel carrier descends to the ground from an IL-76 transport plane during a joint Serbian-Russian military training exercise "Slavic Brotherhood" in the town of Kovin, near Belgrade, Serbia November 7, 2016. REUTERS/Marko Djurica 

Russian paratroopers jump past rainbow from an IL-76 transport plane during a joint Serbian-Russian military training exercise "Slavic Brotherhood" in the town of Kovin, near Belgrade, Serbia November 7, 2016. REUTERS/Marko Djurica 

Russian paratroopers jump from a IL-76 transport plane during a joint Serbian-Russian military training exercise "Slavic Brotherhood" in the town of Kovin, near Belgrade, Serbia November 7, 2016. REUTERS/Marko Djurica 

Russian paratroopers jump from a IL-76 transport plane during a joint Serbian-Russian military training exercise ?Slavic Brotherhood? in the town of Kovin, near Belgrade, Serbia November 7, 2016. REUTERS/Marko Djurica 

Israeli airforce soldiers are seen inside a helicopter during a combined drill with soldiers from the Israeli navy, practicing the evacuation of a wounded person to land from a vessel in the Mediterranean Sea, off the coast of Ashdod, southern Israel September 19, 2016. Picture taken September 19, 2016. REUTERS/Amir Cohen

Reuters photographer Philippe Wojazer is seen in an Alpha jet plane, on its way to the Evreux airbase from Cazaux airbase July 13, 2016. REUTERS/Philippe Wojazer SEARCH "BIRDS BASTILLE" FOR THIS STORY. SEARCH "THE WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY 

Reuters photographer Philippe Wojazer is seen in the overhead mirror in an Alpha jet plane on its way back from the Bastille Day parade to Cazaux airbase, July 14, 2016. REUTERS/Philippe Wojazer SEARCH "BIRDS BASTILLE" FOR THIS STORY. SEARCH "THE WIDER IMAGE" FOR ALL STORIES.

Vietnamese Airforce personnel attend the funeral of their comrades on the rescue aircraft Casa 212, which went missing while searching for a lost pilot and fighter jet, in Hanoi, Vietnam June 30, 2016. REUTERS/Kham 

Soldiers stand in front of wreaths as they attend the funeral of the Vietnamese Airforce personnel on the rescue aircraft Casa 212, which went missing while searching for a lost pilot and fighter jet, in Hanoi, Vietnam June 30, 2016. REUTERS/Kham 

Women mourn as they attend the funeral of the Vietnamese Airforce personnel on the rescue aircraft Casa 212, which went missing while searching for a lost pilot and fighter jet, in Hanoi, Vietnam June 30, 2016. REUTERS/Kham 

Military officers attend the funeral of the Vietnamese Airforce personnel on the rescue aircraft Casa 212, which went missing while searching for a lost pilot and fighter jet, in Hanoi, Vietnam June 30, 2016. REUTERS/Kham 

Candles are lit on top of the coffins of the Vietnamese Airforce personnel on the rescue aircraft Casa 212, which went missing while searching for a lost pilot and fighter jet, at their funeral in Hanoi, Vietnam June 30, 2016. REUTERS/Kham 

A military personnel is seen next to fighter jets on the USS Harry S. Truman aircraft carrier in the eastern Mediterranean Sea June 13, 2016. REUTERS/Baz Ratner SEARCH "USS HARRY S. TRUMAN" FOR THIS STORY. SEARCH "THE WIDER IMAGE" FOR ALL STORIES TPX IMAGES OF THE DAY 

A security member, who was injured during an attack at a camp for Syrian refugees in eastern Jordan near the borders of Iraq, Syria and Jordan, is transported from a military helicopter to al-Hussein Medical Centre in Amman, Jordan, June 21, 2016. REUTERS/Stringer 

A security member, who was injured during an attack at a camp for Syrian refugees in eastern Jordan near the borders of Iraq, Syria and Jordan, is transported from a military helicopter to al-Hussein Medical Centre in Amman, Jordan, June 21, 2016. REUTERS/Stringer 

A security member, who was injured during an attack at a camp for Syrian refugees in eastern Jordan near the borders of Iraq, Syria and Jordan, is transported from a military helicopter to al-Hussein Medical Centre in Amman, Jordan, June 21, 2016. REUTERS/Stringer 

A security member, who was injured during an attack at a camp for Syrian refugees in eastern Jordan near the borders of Iraq, Syria and Jordan, is transported from a military helicopter to al-Hussein Medical Centre in Amman, Jordan, June 21, 2016. REUTERS/Stringer 

U.S. Navy sailors attach ammunition to a F/A-18 fighter jet before a mission on the flight deck of the USS Harry S. Truman aircraft carrier in the eastern Mediterranean Sea June 14, 2016. REUTERS/Baz Ratner TPX IMAGES OF THE DAY 

A military personnel is seen next to fighter jets on the USS Harry S. Truman aircraft carrier in the eastern Mediterranean Sea June 13, 2016. REUTERS/Baz Ratner 

A U.S. Navy F/A-18 fighter jet takes off from the USS Harry S. Truman aircraft carrier in the eastern Mediterranean Sea June 14, 2016. REUTERS/Baz Ratner 

A military personnel walks past fighter jets on the USS Harry S. Truman aircraft carrier in the eastern Mediterranean Sea June 13, 2016. REUTERS/Baz Ratner 

Poland's 6th Airborne Brigade paratroopers jump from a C-130 Hercules plane during the NATO allies' Anakonda 16 exercise near Torun, Poland, June 7, 2016. REUTERS/Kacper Pempel 

British paratroopers jump from a C-130 Hercules plane during the NATO allies' Anakonda 16 exercise near Torun, Poland, June 7, 2016. REUTERS/Kacper Pempel 

Poland's paratroopers jump from CASA C-130 during the NATO allies' Anakonda 16 exercise near Torun, Poland, June 7, 2016. REUTERS/Kacper Pempel 

A military helicopter carrying Binali Yildirim, the likely new leader of Turkey's ruling AK Party, and other government officials departs Durumlu village, the site of an explosion last week, near the Kurdish-dominated city of Diyarbakir, Turkey May 19, 2016. REUTERS/Sertac Kayar 

Members of police special forces stand guard next to a military helicopter after the arrival of Binali Yildirim, the likely new leader of Turkey's ruling AK Party, (not pictured) in Durumlu village, the site of an explosion last week, near the Kurdish-dominated city of Diyarbakir, Turkey May 19, 2016. REUTERS/Sertac Kayar 

A Turkish soldier stands guard next to a military helicopter after the arrival of Binali Yildirim, the likely new leader of Turkey's ruling AK Party, (not pictured) in Durumlu village, the site of an explosion last week, near the Kurdish-dominated city of Diyarbakir, Turkey May 19, 2016. REUTERS/Sertac Kayar 

Journalists sit in a C-130 military transport plane on the tarmac, near Itu Aba, which the Taiwanese call Taiping, at the South China Sea, March 23, 2016. REUTERS/Fabian Hamacher 

Former Ukrainian army pilot Nadezhda Savchenko gestures from inside a glass-walled cage during a verdict hearing at a court in the southern border town of Donetsk in Rostov region, Russia, March 21, 2016. REUTERS/Maxim Shemetov TPX IMAGES OF THE DAY

Former Ukrainian army pilot Nadezhda Savchenko gestures from inside a glass-walled cage during a verdict hearing at a court in the southern border town of Donetsk in Rostov region, Russia, March 21, 2016. REUTERS/Maxim Shemetov 

Paratroopers from the Indian Air Force are pictured during an exercise at Pokhran in the state of Rajasthan, India, March 18, 2016. REUTERS/Amit Dave TPX IMAGES OF THE DAY

A soldier of the People's Liberation Army (PLA) stands guard in front of the Great Hall of the People ahead of the opening session of the National People's Congress (NPC) in Beijing, China, March 5, 2016. REUTERS/Damir Sagolj TPX IMAGES OF THE DAY 

Indian army soldiers carry a coffin containing the body of Tushar Mahajan, an army officer who was killed in a gunbattle, before his wreath laying ceremony in Udhampur, north of Jammu, February 22, 2016. REUTERS/Mukesh Gupta 

Turkish Air Force officer Huseyin Cil, brother of slain Army officer Seckin Cil, comforts his mother Aysel during the funeral ceremony for Seckin Cil in Ankara, Turkey, February 18, 2016. Army officer Seckin Cil was killed during the clashes between Turkish security forces and Kurdish militants in Sur district of the southeastern city of Diyarbakir. REUTERS/Umit Bektas 

Indonesian airforce personnel tidy up their CN235-220 maritime surveillance aircraft displayed at the Singapore Airshow at Changi Exhibition Center February 17, 2016. Picture taken February 17, 2016. REUTERS/Edgar Su

Indonesian airforce personnel stand next to their CN235-220 maritime surveillance aircraft displayed at the Singapore Airshow at Changi Exhibition Center February 17, 2016. Picture taken February 17, 2016. REUTERS/Edgar Su

An Afghan security personnel keeps watch as a helicopter flies during the Afghanistan Air Force readiness performance program at a military airfield in Kabul, Afghanistan February 11, 2016. REUTERS/Ahmad Masood 

Britain's Catherine, Duchess of Cambridge (C) leaves a reception after attending an event to mark the 75th anniversary of the RAF Air Cadets, at The Royal Courts of Judtice in London, Britain February 7, 2016. REUTERS/Neil Hall 

Britain's Catherine, Duchess of Cambridge (C) leaves a reception after attending an event to mark the 75th anniversary of the RAF Air Cadets, at The Royal Courts of Judtice in London, Britain February 7, 2016. REUTERS/Neil Hall 

Britain's Catherine, Duchess of Cambridge (C) walks to a reception after attending an event to mark the 75th anniversary of the RAF Air Cadets, at St Clement Danes church in London, Britain February 7, 2016. REUTERS/Neil Hall 

Britain's Catherine, Duchess of Cambridge (L) walks to a reception after attending an event to mark the 75th anniversary of the RAF Air Cadets, at St Clement Danes church in London, Britain February 7, 2016. REUTERS/Neil Hall 

Britain's Catherine, Duchess of Cambridge (C) walks to a reception after attending an event to mark the 75th anniversary of the RAF Air Cadets, at St Clement Danes church in London, Britain February 7, 2016. REUTERS/Neil Hall