Workers build a pillar at the site of the metro railway flyover under construction in Ahmedabad, India, January 31, 2021. Picture taken January 31, 2021. REUTERS/Amit Dave

Cars pass the Tomb of Al Zahir Qansuh, amid the rubble of demolished mausoleums, cleared to make way for the construction of al-Fardous flyover through graveyards, allegedly from the Mamluk era, on the Qansuh Al Ghuri street, at the Northern Cemetery known as "City of Dead", in the Cairo Necropolis Egypt December 8, 2020. REUTERS/Amr Abdallah Dalsh

People and cars pass the Tomb of Al Zahir Qansuh, amid the rubble of demolished mausoleums, cleared to make way for the construction of al-Fardous flyover through graveyards, allegedly from the Mamluk era, on the Qansuh Al Ghuri street, at the Northern Cemetery known as "City of Dead", in the Cairo Necropolis Egypt December 8, 2020. REUTERS/Amr Abdallah Dalsh

A man works at the Tomb of Al Zahir Qansuh at the Northern Cemetery known as "City of Dead", which is being cleared to make way for the construction of al-Fardous flyover through graveyards, allegedly from the Mamluk era in the Cairo Necropolis, in Egypt December 8, 2020. REUTERS/Amr Abdallah Dalsh

Vehicles drive past the Tomb of Al Zahir Qansuh amid the rubble of demolished mausoleums, cleared to make way for the construction of al-Fardous flyover through graveyards, allegedly from the Mamluk era, on the Qansuh Al Ghuri street, at the Northern Cemetery known as "City of Dead", in the Cairo Necropolis, Egypt December 8, 2020. REUTERS/Amr Abdallah Dalsh

A man wearing a protective face mask walks through a cloud of dust amid the rubble of demolished mausoleums at the Northern Cemetery known as "City of Dead" in order to build a flyover al-Fardous through graveyards, allegedly from the Mamluk era in the Cairo Necropolis, as the coronavirus disease (COVID-19) pandemic continues in Egypt December 8, 2020. REUTERS/Amr Abdallah Dalsh

A man works at the Tomb of Al Zahir Qansuh, amid the rubble of demolished mausoleums, cleared to make way for construction of al-Fardous flyover through graveyards, allegedly from the Mamluk era, at Qansuh Al Ghuri street, in the Northern Cemetery known as "City of Dead", in the Cairo Necropolis, Egypt December 8, 2020. REUTERS/Amr Abdallah Dalsh

A man rides his motorcycle amid the rubble of demolished mausoleums, cleared to make way for the construction of al-Fardous flyover through graveyards, allegedly from the Mamluk era, at the Northern Cemetery known as "City of Dead", in the Cairo Necropolis Egypt December 8, 2020. REUTERS/Amr Abdallah Dalsh

Vintage aircraft make a flyover as U.S. veterans ride in a restored swift boat during a boat parade to celebrate Veterans Day during the outbreak of the coronavirus disease (COVID-19) in San Diego, California, U.S., November 11, 2020. REUTERS/Mike Blake

Vintage aircraft make a flyover as U.S. veterans ride in a restored swift boat during a boat parade to celebrate Veterans Day during the outbreak of the coronavirus disease (COVID-19) in San Diego, California, U.S., November 11, 2020. REUTERS/Mike Blake

Traffic moves on a flyover along a residential area on a smoggy morning in New Delhi, India, November 9, 2020. REUTERS/Danish Siddiqui

Labourers work at a construction site of a flyover amidst smog in New Delhi, India, November 6, 2020. REUTERS/Adnan Abidi

A labourer works at a construction site of a flyover amidst smog in New Delhi, India, November 6, 2020. REUTERS/Adnan Abidi

A boy jumps into a polluted canal from a flyover in Kolkata, India, October 16, 2020. REUTERS/Rupak De Chowdhuri TPX IMAGES OF THE DAY

Airplanes perform a flyover during the reopening ceremony for the Gerald Desmond Bridge in Long Beach, California, U.S., October 2, 2020. REUTERS/Mario Anzuoni

Airplanes perform a flyover during the reopening ceremony for the Gerald Desmond Bridge in Long Beach, California, U.S., October 2, 2020. REUTERS/Mario Anzuoni

A general view of the destroyed graves, demolished by the government during building a flyover through the graveyard, allegedly from the Mamluk era, amid the outbreak of the coronavirus disease (COVID-19), in Cairo, Egypt, August 16, 2020. Picture taken August 16, 2020. REUTERS/Mohamed Abd El Ghany

A girl holding a bottle of water walks in an area where she used to live, beside the destroyed graves, demolished by the government in order to build a flyover through the graveyard, allegedly from the Mamluk era, amid the outbreak of the coronavirus disease (COVID-19), in Cairo, Egypt, August 16, 2020. Picture taken August 16, 2020. REUTERS/Mohamed Abd El Ghany

A view of the destroyed graves, demolished by the government in order to build a flyover through the graveyard, allegedly from the Mamluk era, amid the outbreak of the coronavirus disease (COVID-19), in Cairo, Egypt, August 16, 2020. Picture taken August 16, 2020. REUTERS/Mohamed Abd El Ghany

A general view of the destroyed graves, demolished by the government during building a flyover through the graveyard, allegedly from the Mamluk era, amid the outbreak of the coronavirus disease (COVID-19), in Cairo, Egypt, August 16, 2020. Picture taken August 16, 2020. REUTERS/Mohamed Abd El Ghany

A man walks in front of an area where he used to live, beside the destroyed graves, demolished by the government in order to build a flyover through the graveyard, allegedly from the Mamluk era, amid the outbreak of the coronavirus disease (COVID-19), in Cairo, Egypt, August 16, 2020. Picture taken August 16, 2020. REUTERS/Mohamed Abd El Ghany

A man stands in an area where he used to live, beside the destroyed graves, demolished by the government in order to build a flyover through the graveyard, allegedly from the Mamluk era, amid the outbreak of the coronavirus disease (COVID-19), in Cairo, Egypt, August 16, 2020. Picture taken August 16, 2020. REUTERS/Mohamed Abd El Ghany

A general view of the destroyed graves, demolished by the government during building a flyover through the graveyard, allegedly from the Mamluk era, amid the outbreak of the coronavirus disease (COVID-19), in Cairo, Egypt, August 16, 2020. Picture taken August 16, 2020. REUTERS/Mohamed Abd El Ghany

Workers are seen during building a flyover through destroyed graves, demolished by the government, allegedly from the Mamluk era, amid the outbreak of the coronavirus disease (COVID-19), in Cairo, Egypt, August 16, 2020. Picture taken August 16, 2020. REUTERS/Mohamed Abd El Ghany

People stand at an area where they used to live, beside the destroyed graves demolished by government in order to build a flyover through the graveyard, allegedly from the Mamluk era, amid the outbreak of the coronavirus disease (COVID-19), in Cairo, Egypt July 29, 2020. REUTERS/Mohamed Abd El Ghany

A general view of the destroyed graves demolished by government in order to build a flyover through the graveyard, allegedly from the Mamluk era, amid the outbreak of the coronavirus disease (COVID-19), in Cairo, Egypt July 29, 2020. REUTERS/Mohamed Abd El Ghany

People sit at an area where they used to live, beside the destroyed graves demolished by government in order to build a flyover through the graveyard, allegedly from the Mamluk era, amid the outbreak of the coronavirus disease (COVID-19), in Cairo, Egypt July 29, 2020. REUTERS/Mohamed Abd El Ghany

A general view of the destroyed graves demolished by government in order to build a flyover through the graveyard, allegedly from the Mamluk era, amid the outbreak of the coronavirus disease (COVID-19), in Cairo, Egypt July 29, 2020. REUTERS/Mohamed Abd El Ghany

A dog stands near the destroyed graves demolished by government in order to build a flyover through the graveyard, allegedly from the Mamluk era, amid the outbreak of the coronavirus disease (COVID-19), in Cairo, Egypt July 29, 2020. REUTERS/Mohamed Abd El Ghany

A boy sits at an area where he and his family used to live, beside the destroyed graves demolished by government in order to build a flyover through the graveyard, allegedly from the Mamluk era, amid the outbreak of the coronavirus disease (COVID-19), in Cairo, Egypt July 29, 2020. REUTERS/Mohamed Abd El Ghany

A boy riding a motorbike passes in front of the destroyed graves demolished by government in order to build a flyover through the graveyard, allegedly from the Mamluk era, amid the outbreak of the coronavirus disease (COVID-19), in Cairo, Egypt July 29, 2020. REUTERS/Mohamed Abd El Ghany

U.S. President Donald Trump and first lady Melania Trump watch a U.S. Air Force B2 Stealth Bomber flyover while hosting a 4th of July "2020 Salute to America" to celebrate the U.S. Independence Day holiday on the South Lawn of the White House in Washington, U.S., July 4, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump and first lady Melania Trump watch a U.S. military aircraft flyover while hosting a 4th of July "2020 Salute to America" to celebrate the U.S. Independence Day holiday on the South Lawn of the White House in Washington, U.S., July 4, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump and first lady Melania Trump watch a U.S. military aircraft flyover while hosting a 4th of July "2020 Salute to America" to celebrate the U.S. Independence Day holiday on the South Lawn of the White House in Washington, U.S., July 4, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump stands with first lady Melania Trump as they watch U.S. military aircraft flyovers while hosting a 4th of July "2020 Salute to America" to celebrate the U.S. Independence Day holiday on the South Lawn of the White House in Washington, U.S., July 4, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump talks to first lady Melania Trump as they watch U.S. military aircraft flyovers while hosting a 4th of July "2020 Salute to America" to celebrate the U.S. Independence Day holiday on the South Lawn of the White House in Washington, U.S., July 4, 2020. REUTERS/Carlos Barria

U.S. Air Force F-15 fighter jets fly in formation during a flyover above Hudson River and New York Harbor, U.S. July 4, 2020. REUTERS/Mike Segar/File Photo REFILE - CORRECTING GRAMMAR AND AIRCRAFT TYPE

The U.S. Air Force Thuderbirds demonstration team of F-16 fighter jets perform during a flyover of military aircraft down the Hudson River and New York Harbor past York City, and New Jersey, U.S. July 4, 2020. REUTERS/Mike Segar

A U.S. Air Force B-2 Spirit Stealth Bomber (C) is flanked by 4 U.S. Marine Corps F-35 fighters during a flyover of military aircraft down the Hudson River and New York Harbor past York City, and New Jersey, U.S. July 4, 2020. REUTERS/Mike Segar

The U.S. Air Force Thuderbirds demonstration team of F-16 fighter jets perform during a flyover of military aircraft down the Hudson River and New York Harbor past York City, and New Jersey, U.S. July 4, 2020. REUTERS/Mike Segar TPX IMAGES OF THE DAY

A U.S. Air Force B-2 Spirit Stealth Bomber (C) is flanked by 4 U.S. Marine Corps F-35 fighters during a flyover of military aircraft down the Hudson River and New York Harbor past York City, and New Jersey, U.S. July 4, 2020. REUTERS/Mike Segar

People holding cell phones watch as the 'Blue-Impulse' aerobatic team of Japan Air Self-Defense Force flies over central Tokyo area before flying over the Self-Defense Forces Central Hospital to salute the medical workers at the frontline of the fight against the coronavirus disease (COVID-19) in Tokyo, Japan May 29, 2020. REUTERS/Issei Kato

The 'Blue-Impulse' aerobatic team of Japan Air Self-Defense Force flies over central Tokyo area before flying over the Self-Defense Forces Central Hospital to salute the medical workers at the frontline of the fight against the coronavirus disease (COVID-19) in Tokyo, Japan May 29, 2020. REUTERS/Issei Kato

Medical workers watch the 'Blue-Impulse' aerobatic team of Japan Air Self-Defense Force as they fly over the Self-Defense Forces Central Hospital to salute the medical workers at the frontline of the fight against the coronavirus disease (COVID-19) in Tokyo, Japan May 29, 2020. REUTERS/Issei Kato

A medical worker looks on as the 'Blue-Impulse' aerobatic team of Japan Air Self-Defense Force flies over the Self-Defense Forces Central Hospital to salute the medical workers at the frontline of the fight against the coronavirus disease (COVID-19) in Tokyo, Japan May 29, 2020. REUTERS/Issei Kato

A medical worker takes a picture using his smartphone as the 'Blue-Impulse' aerobatic team of Japan Air Self-Defense Force flies over the Self-Defense Forces Central Hospital to salute the medical workers at the frontline of the fight against the coronavirus disease (COVID-19) in Tokyo, Japan May 29, 2020. REUTERS/Issei Kato

The 'Blue-Impulse' aerobatic team of Japan Air Self-Defense Force flies over the Self-Defense Forces Central Hospital to salute the medical workers at the frontline of the fight against the coronavirus disease (COVID-19) in Tokyo, Japan May 29, 2020. REUTERS/Issei Kato

Medical workers watch the 'Blue-Impulse' aerobatic team of Japan Air Self-Defense Force as they fly over the Self-Defense Forces Central Hospital to salute the medical workers at the frontline of the fight against the coronavirus disease (COVID-19) in Tokyo, Japan May 29, 2020. REUTERS/Issei Kato

The 'Blue-Impulse' aerobatic team of Japan Air Self-Defense Force flies over the Self-Defense Forces Central Hospital to salute the medical workers at the frontline of the fight against the coronavirus disease (COVID-19) in Tokyo, Japan May 29, 2020. REUTERS/Issei Kato

A person gestures as the 'Blue-Impulse' aerobatic team of Japan Air Self-Defense Force flies over the Self-Defense Forces Central Hospital to salute the medical workers at the frontline of the fight against the coronavirus disease (COVID-19) in Tokyo, Japan May 29, 2020. REUTERS/Issei Kato

Medical workers watch the 'Blue-Impulse' aerobatic team of Japan Air Self-Defense Force as they fly over the Self-Defense Forces Central Hospital to salute the medical workers at the frontline of the fight against the coronavirus disease (COVID-19) in Tokyo, Japan May 29, 2020. REUTERS/Issei Kato

Medical workers react as they watch the 'Blue-Impulse' aerobatic team of Japan Air Self-Defense Force as they fly over the Self-Defense Forces Central Hospital to salute the medical workers at the frontline of the fight against the coronavirus disease (COVID-19) in Tokyo, Japan May 29, 2020. REUTERS/Issei Kato

Medical workers react as they watch the 'Blue-Impulse' aerobatic team of Japan Air Self-Defense Force as they fly over the Self-Defense Forces Central Hospital to salute the medical workers at the frontline of the fight against the coronavirus disease (COVID-19) in Tokyo, Japan May 29, 2020. REUTERS/Issei Kato

Medical workers react as they watch the 'Blue-Impulse' aerobatic team of Japan Air Self-Defense Force as they fly over the Self-Defense Forces Central Hospital to salute the medical workers at the frontline of the fight against the coronavirus disease (COVID-19) in Tokyo, Japan May 29, 2020. REUTERS/Issei Kato TPX IMAGES OF THE DAY

Medical workers watch the 'Blue-Impulse' aerobatic team of Japan Air Self-Defense Force as they fly over the Self-Defense Forces Central Hospital to salute the medical workers at the frontline of the fight against the coronavirus disease (COVID-19) in Tokyo, Japan May 29, 2020. REUTERS/Issei Kato

Medical workers holding cell phones watch the 'Blue-Impulse' aerobatic team of Japan Air Self-Defense Force as they fly over the Self-Defense Forces Central Hospital to salute the medical workers at the frontline of the fight against the coronavirus disease (COVID-19) in Tokyo, Japan May 29, 2020. REUTERS/Issei Kato

A medical worker watches the 'Blue-Impulse' aerobatic team of Japan Air Self-Defense Force as they fly over the Self-Defense Forces Central Hospital to salute the medical workers at the frontline of the fight against the coronavirus disease (COVID-19) in Tokyo, Japan May 29, 2020. REUTERS/Issei Kato

Medical workers watch the 'Blue-Impulse' aerobatic team of Japan Air Self-Defense Force as they fly over the Self-Defense Forces Central Hospital to salute the medical workers at the frontline of the fight against the coronavirus disease (COVID-19) in Tokyo, Japan May 29, 2020. REUTERS/Issei Kato

Athletes exercise amid the coronavirus disease (COVID-19) outbreak along the highway flyover in Kondele estate of Kisumu, western Kenya May 21, 2020. Picture taken May 21, 2020. REUTERS/Fred Ooko