A National Guard member guards the area in the aftermath of a protest after a white police officer was caught on a bystander's video pressing his knee into the neck of African-American man George Floyd, who later died at a hospital, in Minneapolis, Minnesota, U.S., May 29, 2020. REUTERS/Carlos Barria

National Guard members walk at the area in the aftermath of a protest after a white police officer was caught on a bystander's video pressing his knee into the neck of African-American man George Floyd, who later died at a hospital, in Minneapolis, Minnesota, U.S., May 29, 2020. REUTERS/Carlos Barria

A man walks at the area in the aftermath of a protest after a white police officer was caught on a bystander's video pressing his knee into the neck of African-American man George Floyd, who later died at a hospital, in Minneapolis, Minnesota, U.S., May 29, 2020. REUTERS/Carlos Barria TPX IMAGES OF THE DAY

National Guard members guard the area in the aftermath of a protest after a white police officer was caught on a bystander's video pressing his knee into the neck of African-American man George Floyd, who later died at a hospital, in Minneapolis, Minnesota, U.S., May 29, 2020. REUTERS/Carlos Barria

Plumes of smoke rise into the sky in the aftermath of a protest after a white police officer was caught on a bystander's video pressing his knee into the neck of African-American man George Floyd, who later died at a hospital, in Minneapolis, Minnesota, U.S., May 29, 2020. REUTERS/Carlos Barria

Plumes of smoke rise into the sky in the aftermath of a protest after a white police officer was caught on a bystander's video pressing his knee into the neck of African-American man George Floyd, who later died at a hospital, in Minneapolis, Minnesota, U.S., May 29, 2020. REUTERS/Carlos Barria TPX IMAGES OF THE DAY

Plumes of smoke rise into the sky in the aftermath of a protest after a white police officer was caught on a bystander's video pressing his knee into the neck of African-American man George Floyd, who later died at a hospital, in Minneapolis, Minnesota, U.S., May 29, 2020. REUTERS/Carlos Barria

A SkyUp Boeing 737-800 aircraft (L) and a Ukraine International Airlines Boeing 737-900 plane are seen at the Boryspil International Airport amid the coronavirus disease (COVID-19) outbreak, outside Kiev, Ukraine May 26, 2020. Picture taken May 26, 2020. REUTERS/Gleb Garanich

A person walks outside a Boeing 737-800 plane of Ukrainian low-cost airline SkyUp which converted most of its passenger planes to carry cargo amid the coronavirus disease (COVID-19) outbreak, at the Boryspil International Airport outside Kiev, Ukraine May 26, 2020. Picture taken May 26, 2020. REUTERS/Gleb Garanich

Top officials and a pilot of Ukrainian low-cost airline SkyUp which converted most of its passenger planes to carry cargo amid the coronavirus disease (COVID-19) outbreak, stand next to an aircraft at the Boryspil International Airport outside Kiev, Ukraine May 26, 2020. Picture taken May 26, 2020. REUTERS/Gleb Garanich

An aircraft of Ukrainian low-cost airline SkyUp which converted most of its passenger planes to carry cargo amid the coronavirus disease (COVID-19) outbreak, is seen at the Boryspil International Airport outside Kiev, Ukraine May 26, 2020. Picture taken May 26, 2020. REUTERS/Gleb Garanich

A pilot's hat and a protective face mask are seen inside a Boeing 737-800 plane of Ukrainian low-cost airline SkyUp which converted most of its passenger planes to carry cargo amid the coronavirus disease (COVID-19) outbreak, at the Boryspil International Airport outside Kiev, Ukraine May 26, 2020. Picture taken May 26, 2020. REUTERS/Gleb Garanich

Yevhen Khainatsky, Director General of Ukrainian low-cost airline SkyUp which converted most of its passenger planes to carry cargo amid the coronavirus disease (COVID-19) outbreak, poses for a picture inside a Boeing 737-800 plane at the Boryspil International Airport outside Kiev, Ukraine May 26, 2020. Picture taken May 26, 2020. REUTERS/Gleb Garanich

An aircraft of Ukrainian low-cost airline SkyUp which converted most of its passenger planes to carry cargo amid the coronavirus disease (COVID-19) outbreak, is seen at the Boryspil International Airport outside Kiev, Ukraine May 26, 2020. Picture taken May 26, 2020. REUTERS/Gleb Garanich

An aircraft of Ukrainian low-cost airline SkyUp which converted most of its passenger planes to carry cargo amid the coronavirus disease (COVID-19) outbreak, is seen at the Boryspil International Airport outside Kiev, Ukraine May 26, 2020. Picture taken May 26, 2020. REUTERS/Gleb Garanich

Oleh Popovych, a pilot of Ukrainian low-cost airline SkyUp which converted most of its passenger planes to carry cargo amid the coronavirus disease (COVID-19) outbreak, is seen in the cockpit of the Boeing 737-800 plane at the Boryspil International Airport outside Kiev, Ukraine May 26, 2020. Picture taken May 26, 2020. REUTERS/Gleb Garanich

Oleh Popovych, a pilot of Ukrainian low-cost airline SkyUp which converted most of its passenger planes to carry cargo amid the coronavirus disease (COVID-19) outbreak, walks inside a Boeing 737-800 plane at the Boryspil International Airport outside Kiev, Ukraine May 26, 2020. Picture taken May 26, 2020. REUTERS/Gleb Garanich

Aircraft of Ukrainian low-cost airline SkyUp which converted most of its passenger planes to carry cargo amid the coronavirus disease (COVID-19) outbreak, are seen at the Boryspil International Airport outside Kiev, Ukraine May 26, 2020. Picture taken May 26, 2020. REUTERS/Gleb Garanich

An interior view shows a Boeing 737-800 aircraft of Ukrainian low-cost airline SkyUp which converted most of its passenger planes to carry cargo amid the coronavirus disease (COVID-19) outbreak, at the Boryspil International Airport outside Kiev, Ukraine May 26, 2020. Picture taken May 26, 2020. REUTERS/Gleb Garanich

An aircraft of Ukrainian low-cost airline SkyUp which converted most of its passenger planes to carry cargo amid the coronavirus disease (COVID-19) outbreak, is seen at the Boryspil International Airport outside Kiev, Ukraine May 26, 2020. Picture taken May 26, 2020. REUTERS/Gleb Garanich

Aircraft of Ukrainian low-cost airline SkyUp which converted most of its passenger planes to carry cargo amid the coronavirus disease (COVID-19) outbreak, are seen at the Boryspil International Airport outside Kiev, Ukraine May 26, 2020. Picture taken May 26, 2020. REUTERS/Gleb Garanich

Fireworks light up the sky above the Amman Citadel during a celebration of the country's 74th Independence Day within a limited number of activities amid the spread of the coronavirus disease (COVID-19), in Amman, Jordan May 25, 2020. REUTERS/Muhammad Hamed

Fireworks light up the sky above the Amman Citadel during a celebration of the country's 74th Independence Day within a limited number of activities amid the spread of the coronavirus disease (COVID-19), in Amman, Jordan May 25, 2020. REUTERS/Muhammad Hamed

Fireworks light up the sky above the Amman Citadel during a celebration of the country's 74th Independence Day within a limited number of activities amid the spread of the coronavirus disease (COVID-19), in Amman, Jordan May 25, 2020. REUTERS/Muhammad Hamed

Fireworks light up the sky above the Amman Citadel during a celebration of the country's 74th Independence Day within a limited number of activities amid the spread of the coronavirus disease (COVID-19), in Amman, Jordan May 25, 2020. REUTERS/Muhammad Hamed

Fireworks light up the sky above the Abdali Boulevard, next to the crescent moon, during a celebration of the country's 74th Independence Day within a limited number of activities amid the spread of the coronavirus disease (COVID-19), in Amman, Jordan May 25, 2020. REUTERS/Muhammad Hamed

Fireworks light up the sky above the Abdali Boulevard, next to the crescent moon, during a celebration of the country's 74th Independence Day within a limited number of activities amid the spread of the coronavirus disease (COVID-19), in Amman, Jordan May 25, 2020. REUTERS/Muhammad Hamed TPX IMAGES OF THE DAY

Fireworks light up the sky above the Abdali Boulevard during a celebration of the country's 74th Independence Day within a limited number of activities amid the spread of the coronavirus disease (COVID-19), in Amman, Jordan May 25, 2020. REUTERS/Muhammad Hamed

Sky News chief political correspondent Jon Craig is seen reading a newspaper with a picture of Dominic Cummings, special advisor for Britain's Prime Minister Boris Johnson, displayed on the front, on Downing Street following the outbreak of the coronavirus disease (COVID-19), London, Britain, May 25, 2020. REUTERS/Henry Nicholls

Soho Lounge bouncer, Sky Bryson, surveys the scene on Sixth Street on the first night that bars reopen after they were closed to stop the spread of the coronavirus disease (COVID-19) in Austin, Texas, U.S., May 22, 2020. Picture taken May 22, 2020. REUTERS/Nuri Vallbona

Soho Lounge bouncer, Sky Bryson, surveys the scene on Sixth Street on the first night that bars reopen after they closed to stop the spread of the coronavirus disease (COVID-19) in Austin, Texas, U.S., May 22, 2020. Picture taken May 22, 2020. REUTERS/Nuri Vallbona

The night sky covers the National Museum of African American History and Culture, closed to tourists during the coronavirus disease (COVID-19) outbreak in Washington, U.S., May 22, 2020. Picture taken May 22, 2020. REUTERS/Jonathan Ernst

People are silhouetted against the sky during the sunset following the sixty day of lockdown imposed by the government amid concerns about the spread of the coronavirus disease (COVID-19) outbreak, in Lalitpur, Nepal May 22, 2020. REUTERS/Navesh Chitrakar

A man wearing a protective mask carries an umbrella as a sudden thunderstorm darkens the mid-afternoon sky on the day of the opening session of the Chinese People s Political Consultative Conference (CPPCC) following the coronavirus disease (COVID-19) outbreak in Beijing, China May 21, 2020. REUTERS/Thomas Peter

A man wearing a protective mask carries an umbrella while riding a bike as a sudden thunderstorm darkens the mid-afternoon sky on the day of the opening session of the Chinese People s Political Consultative Conference (CPPCC) following the coronavirus disease (COVID-19) outbreak in Beijing, China May 21, 2020. REUTERS/Thomas Peter

A man wearing a protective mask carries an umbrella as a sudden thunderstorm darkens the mid-afternoon sky on the day of the opening session of the Chinese People s Political Consultative Conference (CPPCC) following the coronavirus disease (COVID-19) outbreak in Beijing, China May 21, 2020. REUTERS/Thomas Peter

A woman wearing a protective mask carries an umbrella as a sudden thunderstorm darkens the mid-afternoon sky on the day of the opening session of the Chinese People s Political Consultative Conference (CPPCC) following the coronavirus disease (COVID-19) outbreak in Beijing, China May 21, 2020. REUTERS/Thomas Peter TPX IMAGES OF THE DAY

A woman wearing a protective mask carries an umbrella as a sudden thunderstorm darkens the mid-afternoon sky on the day of the opening session of the Chinese People s Political Consultative Conference (CPPCC) following the coronavirus disease (COVID-19) outbreak in Beijing, China May 21, 2020. REUTERS/Thomas Peter

A woman wearing a protective mask holds her hand into the the downpour of rain as a thunderstorm darkens the mid-afternoon sky on the day of the opening session of the Chinese People s Political Consultative Conference (CPPCC) following the coronavirus disease (COVID-19) outbreak in Beijing, China May 21, 2020. REUTERS/Thomas Peter

A man in rain gear wades through a puddle as a sudden thunderstorm darkens the mid-afternoon sky on the day of the opening session of the Chinese People s Political Consultative Conference (CPPCC) following the coronavirus disease (COVID-19) outbreak in Beijing, China May 21, 2020. REUTERS/Thomas Peter

People seek shelter from heavy rain in the entrance of a shopping mall as a sudden thunderstorm darkens the mid-afternoon sky on the day of the opening session of the Chinese People s Political Consultative Conference (CPPCC) following the coronavirus disease (COVID-19) outbreak in Beijing, China May 21, 2020. REUTERS/Thomas Peter

A man wearing a protective mask carries an umbrella after leaving a shopping mall as a sudden thunderstorm darkens the mid-afternoon sky on the day of the opening session of the Chinese People s Political Consultative Conference (CPPCC) following the coronavirus disease (COVID-19) outbreak in Beijing, China May 21, 2020. REUTERS/Thomas Peter

Men wearing protective masks and raincoats walk in a street as a sudden thunderstorm darkens the mid-afternoon sky on the day of the opening session of the Chinese People s Political Consultative Conference (CPPCC) following the coronavirus disease (COVID-19) outbreak in Beijing, China May 21, 2020. REUTERS/Thomas Peter

People seek shelter from heavy rain in the entrance of a shopping mall as a sudden thunderstorm darkens the mid-afternoon sky on the day of the opening session of the Chinese People s Political Consultative Conference (CPPCC) following the coronavirus disease (COVID-19) outbreak in Beijing, China May 21, 2020. REUTERS/Thomas Peter

A man rides a Niu electric scooter through a puddle as a sudden thunderstorm darkens the mid-afternoon sky on the day of the opening session of the Chinese People s Political Consultative Conference (CPPCC), following the coronavirus disease (COVID-19) outbreak in Beijing, China May 21, 2020. REUTERS/Thomas Peter

Plumes of smoke rise into the sky from a large fire at the storehouse and display room of El Sallab group for Ceramic and Porcelain in Cairo, Egypt, May 19, 2020. REUTERS/Amr Abdallah Dalsh

Cars drive close to plumes of smoke rising into the sky from a large fire at the storehouse and display room of El Sallab group for Ceramic and Porcelain in Cairo, Egypt, May 19, 2020. REUTERS/Amr Abdallah Dalsh

Plumes of smoke rise into the sky from a large fire at the storehouse and display room of El Sallab group for Ceramic and Porcelain in Cairo, Egypt, May 19, 2020. REUTERS/Amr Abdallah Dalsh

People look at plumes of smoke rising into the sky from a large fire at the storehouse and display room of El Sallab group for Ceramic and Porcelain in Cairo, Egypt, May 19, 2020. REUTERS/Amr Abdallah Dalsh

Plumes of smoke rise into the sky from a large fire at the storehouse and display room of El Sallab group for Ceramic and Porcelain in Cairo, Egypt, May 19, 2020. REUTERS/Amr Abdallah Dalsh

Plumes of smoke rise into the sky from a large fire at the storehouse and display room of El Sallab group for Ceramic and Porcelain in Cairo, Egypt, May 19, 2020. REUTERS/Amr Abdallah Dalsh

An Air France SkyTeam passenger jet takes off at Paris Charles de Gaulle airport in Roissy-en-France during the outbreak of the coronavirus disease (COVID-19) in France May 19, 2020. REUTERS/Charles Platiau

A general view shows the city under the stormy sky in Moscow, Russia May 18, 2020. REUTERS/Maxim Shemetov

Healthcare workers in front of the main entrance of Henry Ford Hospital point to the sky as the U.S. Navy Blue Angels' flyover as a salute to frontline workers amid an outbreak of the coronavirus disease (COVID-19) in Detroit, Michigan, U.S., May 12, 2020. REUTERS/Emily Elconin

A combination picture shows (L-R) Warunee Kaewsathitwong, assistant hostess manager, Natchawarin Tanasanphongsaton, restaurant manager, Juckkrit Sayplian, restaurant captain, Netchanok Wongchaiya, guest satisfaction agent, Ardar June Brown, chief receptionist and Thawatchai Tasago, assistant food and beverage manager posing on the roof of the Baiyoke sky hotel in their usual uniforms (top) and in the ones corresponding with their new tasks assigned by the hotel (bottom) as Thais adapt to the new economic reality during the coronavirus disease (COVID-19) outbreak in Bangkok, Thailand April 30, 2020. Pictures taken April 30, 2020. REUTERS/Athit Perawongmetha

(L-R) Warunee Kaewsathitwong, assistant hostess manager, Natchawarin Tanasanphongsaton, restaurant manager, Juckkrit Sayplian, restaurant captain, Netchanok Wongchaiya, guest satisfaction agent, Ardar June Brown, chief receptionist and Thawatchai Tasago, assistant food and beverage manager pose in the uniforms of their temporarily assigned tasks on the roof of the Baiyoke sky hotel in Bangkok, Thailand, April 30, 2020. Picture taken April 30, 2020. REUTERS/Athit Perawongmetha

(L-R) Warunee Kaewsathitwong, assistant hostess manager, Natchawarin Tanasanphongsaton, restaurant manager, Juckkrit Sayplian, restaurant captain, Netchanok Wongchaiya, guest satisfaction agent, Ardar June Brown, chief receptionist and Thawatchai Tasago, assistant food and beverage manager pose in the uniforms of their temporarily suspendeded jobs on the roof of the Baiyoke sky hotel in Bangkok, Thailand, April 30, 2020. Picture taken April 30, 2020. REUTERS/Athit Perawongmetha

A deserted shopping street presenting the installation entitled "Umbrella Sky Project" created by Portuguese artist Patricia Cunha is seen in Paris as France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19), France, May 11, 2020. REUTERS/Charles Platiau

A deserted shopping street presenting the installation entitled "Umbrella Sky Project" created by Portuguese artist Patricia Cunha is seen in Paris as France begun a gradual end to a nationwide lockdown due to the coronavirus disease (COVID-19), France, May 11, 2020. REUTERS/Charles Platiau

Spectators watch as fireworks explode in the sky as part of celebrations on Victory Day, marking the anniversary of the victory over Nazi Germany in World War Two, in Moscow, Russia May 9, 2020. REUTERS/Evgenia Novozhenina TPX IMAGES OF THE DAY