Mexico's Air Force planes fly in formation during the National Flag Day event in Iguala, Guerrero State, Mexico February 24, 2021. REUTERS/Henry Romero

A plane engine is pictured at the IMA aeronautics institute in Casablanca, Morocco February 23, 2021. Picture taken February 23, 2021. REUTERS/Abdelhak Balhaki

A container with Sinovac coronavirus disease (COVID-19) vaccines is seen after it was unloaded from a plane at Bangkok's Suvarnabhumi International Airport, in Bangkok, Thailand February 24, 2021. REUTERS/Athit Perawongmetha

A container with Sinovac coronavirus disease (COVID-19) vaccines is unloaded from a plane at Bangkok's Suvarnabhumi International Airport, in Bangkok, Thailand February 24, 2021. REUTERS/Athit Perawongmetha

Thailand's Prime Minister Prayuth Chan-ocha walks past a container, as he attends the arrival of a plane with a shipment of 200,000 doses of the Sinovac coronavirus disease (COVID-19) vaccine from China at Bangkok's Suvarnabhumi International Airport, Thailand, February 24, 2021. REUTERS/Athit Perawongmetha

Thailand's Prime Minister Prayuth Chan-ocha and Public Health Minister Anutin Charnvirakul stand next to a container, as they attend the arrival of a plane with a shipment of 200,000 doses of the Sinovac coronavirus disease (COVID-19) vaccine from China at Bangkok's Suvarnabhumi International Airport, Thailand, February 24, 2021. REUTERS/Athit Perawongmetha

Thailand's Prime Minister Prayuth Chan-ocha and Public Health Minister Anutin Charnvirakul stand next to a container, as they attend the arrival of a plane with a shipment of 200,000 doses of the Sinovac coronavirus disease (COVID-19) vaccine from China at Bangkok's Suvarnabhumi International Airport, Thailand, February 24, 2021. REUTERS/Athit Perawongmetha

Thailand's Prime Minister Prayuth Chan-ocha and Public Health Minister Anutin Charnvirakul applaud next to a container as they attend the arrival of a plane with a shipment of 200,000 doses of the Sinovac coronavirus disease (COVID-19) vaccine from China at Bangkok's Suvarnabhumi International Airport, Thailand, February 24, 2021. REUTERS/Athit Perawongmetha TPX IMAGES OF THE DAY

Thailand's Prime Minister Prayuth Chan-ocha and Public Health Minister Anutin Charnvirakul applaud next to a container as they attend the arrival of a plane with a shipment of 200,000 doses of the Sinovac coronavirus disease (COVID-19) vaccine from China at Bangkok's Suvarnabhumi International Airport, Thailand, February 24, 2021. REUTERS/Athit Perawongmetha

A container with Sinovac coronavirus disease (COVID-19) vaccines is unloaded from a plane at Bangkok's Suvarnabhumi International Airport, in Bangkok, Thailand February 24, 2021. REUTERS/Athit Perawongmetha

A container with Sinovac coronavirus disease (COVID-19) vaccines is unloaded from a plane at Bangkok's Suvarnabhumi International Airport, in Bangkok, Thailand February 24, 2021. REUTERS/Athit Perawongmetha

Officials load the bodies of the Italian ambassador to Democratic Republic of Congo Luca Attanasio and his Italian security Vittorio Iacovacci, who were both killed in an attempted kidnapping when their convoy was attacked in Ruhimba village, into a military plane at the Goma International Airport, in Goma, Democratic Republic of the Congo February 23, 2021. REUTERS/Hereward Holland

Italian Catholic priest Franco Bordignon watches as a military plane carrying the bodies of Italian ambassador to Democratic Republic of Congo Luca Attanasio and his Italian security Vittorio Iacovacci, who were both killed in an attempted kidnapping when their convoy was attacked in Ruhimba village, takes off from the Goma International Airport, in Goma, Democratic Republic of the Congo February 23, 2021. REUTERS/Hereward Holland

Officials load the bodies of the slain Italian ambassador to Democratic Republic of Congo Luca Attanasio and his Italian security Vittorio Iacovacci, who were both killed in an attempted kidnapping when their convoy was attacked in Ruhimba village, into a military plane at the Goma International Airport, in Goma, Democratic Republic of the Congo February 23, 2021. REUTERS/Hereward Holland

Officials load the bodies of the slain Italian ambassador to Democratic Republic of Congo Luca Attanasio and his Italian security Vittorio Iacovacci, who were both killed in an attempted kidnapping when their convoy was attacked in Ruhimba village, into a military plane at the Goma International Airport, in Goma, Democratic Republic of the Congo February 23, 2021. REUTERS/Hereward Holland

Officials load the bodies of the slain Italian ambassador to Democratic Republic of Congo Luca Attanasio and his Italian security Vittorio Iacovacci, who were both killed in an attempted kidnapping when their convoy was attacked in Ruhimba village, into a military plane at the Goma International Airport, in Goma, Democratic Republic of the Congo February 23, 2021. REUTERS/Hereward Holland TPX IMAGES OF THE DAY

Officials prepare to load the bodies the slain Italian ambassador to Democratic Republic of Congo Luca Attanasio and his Italian security Vittorio Iacovacci, who were both killed in an attempted kidnap when their convoy was attacked in Ruhimba village, into a military plane at the Goma airport in eastern Democratic Republic of the Congo February 23, 2021. REUTERS/Hereward Holland

Officials prepare to load the bodies of the slain Italian ambassador to Democratic Republic of Congo Luca Attanasio and his Italian security Vittorio Iacovacci, who were both killed in an attempted kidnapping when their convoy was attacked in Ruhimba village, into a military plane at the Goma International Airport, in Goma, Democratic Republic of the Congo February 23, 2021. REUTERS/Hereward Holland

An Italian military plane carrying the bodies of the slain Italian ambassador to Democratic Republic of Congo Luca Attanasio and his Italian security Vittorio Iacovacci, who were both killed in an attempted kidnapping when their convoy was attacked in Ruhimba village, is seen at the Goma International Airport, in Goma, Democratic Republic of the Congo February 23, 2021. REUTERS/Hereward Holland

Model planes of Lockheed Martin are seen in the International Defence Exhibition, Abu Dhabi, United Arab Emirates February 22, 2021. REUTERS/Khushnum Bhandari

People and rescuers gather at the site where a Nigerian air force plane crashed while approaching the Abuja airport runway, according to the aviation minister, in Abuja, Nigeria February 21, 2021. REUTERS/Afolabi Sotunde

People and rescuers gather at the site where a Nigerian air force plane crashed while approaching the Abuja airport runway, according to the aviation minister, in Abuja, Nigeria February 21, 2021. REUTERS/Afolabi Sotunde

People gather near the site where a Nigerian air force plane crashed while approaching the Abuja airport runway, according to the aviation minister, in Abuja, Nigeria February 21, 2021. REUTERS/Afolabi Sotunde

Rescuers and police work at the site where a Nigerian air force plane crashed while approaching the Abuja airport runway, according to the aviation minister, in Abuja, Nigeria February 21, 2021. REUTERS/Afolabi Sotunde

Rescuers walk at the site where a Nigerian air force plane crashed while approaching the Abuja airport runway, according to the aviation minister, in Abuja, Nigeria February 21, 2021. REUTERS/Afolabi Sotunde

Rescuers and people gather near the debris of a Nigerian air force plane, which according to the aviation minister crashed while approaching the Abuja airport runway, in Abuja, Nigeria February 21, 2021. REUTERS/Afolabi Sotunde TPX IMAGES OF THE DAY

Rescuers and people gather near the debris of a Nigerian air force plane, which according to the aviation minister crashed while approaching the Abuja airport runway, in Abuja, Nigeria February 21, 2021. REUTERS/Afolabi Sotunde

Rescuers and people gather near the debris from a Nigerian air force plane, which according to the aviation minister crashed while approaching the Abuja airport runway, in Abuja, Nigeria February 21, 2021. REUTERS/Afolabi Sotunde

People watch as rescuers inspect the debris from a Nigerian air force plane, which crashed while approaching the Abuja airport runway according to aviation minister, in Abuja, Nigeria February 21, 2021. REUTERS/Abraham Achirga

The plane carrying the first doses of the Sinovac Biotech coronavirus disease (COVID-19) vaccines is seen at Benito Juarez International airport, as the coronavirus disease (COVID-19) outbreak continues, in Mexico City, Mexico February 20, 2021. REUTERS/Edgard Garrido

The plane carrying the first doses of the Sinovac Biotech coronavirus disease (COVID-19) vaccines is seen at Benito Juarez International airport, as the coronavirus disease (COVID-19) outbreak continues, in Mexico City, Mexico February 20, 2021. REUTERS/Edgard Garrido

A soldier stands guard as a plane carrying doses of Russia's Sputnik V vaccine against the coronavirus disease (COVID-19), lands at the airport, in Luque, Paraguay February 18, 2021. REUTERS/Cesar Olmedo

Customs officers look on as the plane with a batch of the Pfizer-BioNTech COVID-19 vaccines arrives at Benito Juarez International airport, amidst the spread of the coronavirus disease (COVID-19), in Mexico City, Mexico February 16, 2021. REUTERS/Carlos Jasso

Mexico's Foreign Minister Marcelo Ebrard waits for an arrival of a plane with a batch of the AstraZeneca coronavirus disease (COVID-19) vaccine, at Benito Juarez's international airport in Mexico City, Mexico February 14, 2021. REUTERS/Henry Romero

Soldiers stand in front of a plane containing a batch of the AstraZeneca coronavirus disease (COVID-19) vaccine after its arrival at Benito Juarez's international airport in Mexico City, Mexico February 14, 2021. REUTERS/Henry Romero

The first batch of the shipment of the Pfizer/BioNTech vaccine against the coronavirus disease (COVID-19) is unloaded from a plane at Beirut International Airport, Lebanon February 13, 2021. REUTERS/Mohamed Azakir

The first batch of the shipment of the Pfizer/BioNTech vaccine against the coronavirus disease (COVID-19) is unloaded from a plane at Beirut International Airport, Lebanon February 13, 2021. REUTERS/Mohamed Azakir

The first batch of the shipment of the Pfizer/BioNTech vaccine against the coronavirus disease (COVID-19) is unloaded from a plane at Beirut International Airport, Lebanon February 13, 2021. REUTERS/Mohamed Azakir

Members of the World Health Organisation (WHO) team tasked with investigating the origins of the coronavirus disease (COVID-19) board a plane at the Pudong International Airport in Shanghai, China February 10, 2021. REUTERS/Aly Song

International planes are seen parked at the airport of the Red Sea resort of Sharm el-Sheikh, south of Cairo, Egypt February 4, 2021. REUTERS/Amr Abdallah Dalsh

A plane approaches Frankfurt airport next to a residential building as the spread of the coronavirus disease (COVID-19) continues during an extended lockdown and a demand by the German government for more home office possibilities in Frankfurt, Germany, February 3, 2021. REUTERS/Kai Pfaffenbach

A plane flies in a red sky above London, Britain February 3, 2021. REUTERS/Kevin Coombs TPX IMAGES OF THE DAY

Portugal's Defense Minister Joao Cravinho, Health Minister Marta Temido and Germany Ambassador to Portugal Martin Ney walk to the plane to receive German doctors after their arrival at the Figo Maduro military airport to help Portugal amid the coronavirus disease (COVID-19) pandemic, in Lisbon, Portugal, February 3, 2021. REUTERS/Pedro Nunes

An A400M military transport plane carrying 26 doctors, nurses and hygiene experts as well as 40 mobile and 10 stationary ventilators takes off, in Wunstorf, Germany, February 3, 2021. REUTERS/Fabian Bimmer

An A400M military transport plane carrying 26 doctors, nurses and hygiene experts as well as 40 mobile and 10 stationary ventilators takes off, in Wunstorf, Germany, February 3, 2021. REUTERS/Fabian Bimmer

Portuguese ambassador in Germany, Henrique Nelson Portela Guede stands in front of an A400M military transport plane in Wunstorf, Germany, February 3, 2021. REUTERS/Fabian Bimmer

Staff members enter aboard an A400M military transport plane to COVID-19 stricken Portugal in Wunstorf, Germany, February 3, 2021. REUTERS/Fabian Bimmer

Military doctor, Ulrich Baumgaertner stands in front of an A400M military transport plane in Wunstorf, Germany, February 3, 2021. REUTERS/Fabian Bimmer

German armed forces Bundeswehr staff load equipment aboard an A400M military transport plane to COVID-19 stricken Portugal in Wunstorf, Germany, February 3, 2021. REUTERS/Fabian Bimmer

An A400M military transport plane is pictured during loading in Wunstorf, Germany, February 3, 2021. REUTERS/Fabian Bimmer

German armed forces Bundeswehr staff load equipment aboard an A400M military transport plane to COVID-19 stricken Portugal in Wunstorf, Germany, February 3, 2021. REUTERS/Fabian Bimmer

A member of German armed forces Bundeswehr staff loads equipment aboard an A400M military transport plane to COVID-19 stricken Portugal in Wunstorf, Germany, February 3, 2021. REUTERS/Fabian Bimmer

An airforce plane carrying transferred COVID-19 patients from Lisbon arrives at Cristiano Ronaldo airport in Funchal, amid the coronavirus disease (COVID-19) pandemic, in Funchal, on the island of Madeira, Portugal, January 29, 2021. REUTERS/Duarte Sa

An airforce plane carrying transferred COVID-19 patients from Lisbon arrives at Cristiano Ronaldo airport in Funchal, amid the coronavirus disease (COVID-19) pandemic, in Funchal, on the island of Madeira, Portugal, January 29, 2021. REUTERS/Duarte Sa

An Aerolineas Argentinas plane transporting a shipment of the Sputnik V (Gam-COVID-Vac) vaccine against the coronavirus disease (COVID-19) lands at Ezeiza International Airport, in Buenos Aires, Argentina January 28, 2021. REUTERS/Agustin Marcarian

An Aerolineas Argentinas plane is seen after landing with a shipment of the Sputnik V (Gam-COVID-Vac) vaccine against the coronavirus disease (COVID-19), at Ezeiza International Airport, in Buenos Aires, Argentina January 28, 2021. REUTERS/Agustin Marcarian

A Best Western sign is seen on the side of a building as a plane lands at Heathrow Airport, as the spread of the coronavirus disease (COVID-19) continues, in London, Britain, January 26, 2021. REUTERS/Andrew Couldridge

A plane flies over the Park Grand hotel at Heathrow Airport, as the spread of the coronavirus disease (COVID-19) continues, in London, Britain, January 26, 2021. REUTERS/Andrew Couldridge

An Israeli El AL plane with the slogan "#WeRemember" in support of the campaign for the International Holocaust Remembrance Day, arrives from Tel Aviv at the Berlin-Brandenburg airport in Schoenefeld near Berlin, Germany January 25, 2021. Markus Schreiber/Pool via REUTERS

An Israeli El AL plane with the slogan "#WeRemember" in support of the campaign for the International Holocaust Remembrance Day, arrives from Tel Aviv at the Berlin-Brandenburg airport in Schoenefeld near Berlin, Germany January 25, 2021. Markus Schreiber/Pool via REUTERS