Lava flows and smoke rises during sunrise following the eruption of a volcano on the Canary Island of La Palma, in Todoque, Spain, September 28, 2021. REUTERS/Nacho Doce

A WZ-7 high-altitude reconnaissance drone is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

A KJ-500 early warning aircraft is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

A WZ-8 high-altitude drone is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

Lava flows and smoke rises during sunrise following the eruption of a volcano on the Canary Island of La Palma, in Todoque, Spain, September 28, 2021. REUTERS/Nacho Doce

Visitors look at a J-16D electronic warfare aircraft displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

Visitors look at a J-16D electronic warfare aircraft displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

Visitors look at a KJ-500 early warning aircraft displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

A Wing Loong II armed drone is seen displayed at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

Unaccompanied refugee minors board an Aegean Airlines aircraft that will transfer them to France under a European Commission-funded relocation program, at the Eleftherios Venizelos International Airport in Athens, Greece, September 28, 2021. REUTERS/Alkis Konstantinidis

Unaccompanied refugee minors board an Aegean Airlines aircraft that will transfer them to France under a European Commission-funded relocation program, at the Eleftherios Venizelos International Airport in Athens, Greece, September 28, 2021. REUTERS/Alkis Konstantinidis

A boy waves as unaccompanied refugee minors board an Aegean Airlines aircraft that will transfer them to France under a European Commission-funded relocation program, at the Eleftherios Venizelos International Airport in Athens, Greece, September 28, 2021. REUTERS/Alkis Konstantinidis

A boy waves as unaccompanied refugee minors board an Aegean Airlines aircraft that will transfer them to France under a European Commission-funded relocation program, at the Eleftherios Venizelos International Airport in Athens, Greece, September 28, 2021. REUTERS/Alkis Konstantinidis

Unaccompanied refugee minors board an Aegean Airlines aircraft that will transfer them to France under a European Commission-funded relocation program, at the Eleftherios Venizelos International Airport in Athens, Greece, September 28, 2021. REUTERS/Alkis Konstantinidis

Unaccompanied refugee minors board an Aegean Airlines aircraft that will transfer them to France under a European Commission-funded relocation program, at the Eleftherios Venizelos International Airport in Athens, Greece, September 28, 2021. REUTERS/Alkis Konstantinidis

Electricity transmission towers are pictured near Beijing’s Central Business District (CBD), China September 28, 2021. REUTERS/Tingshu Wang

Electricity transmission towers are pictured in Beijing, China September 28, 2021. REUTERS/Tingshu Wang

Electricity transmission towers are pictured near residential buildings in Beijing, China September 28, 2021. REUTERS/Tingshu Wang

An airplane flies over electricity transmission wires, in Beijing, China September 28, 2021. REUTERS/Tingshu Wang

A man watches Chinese People's Liberation Army (PLA) Air Force Red Falcon aerobatic team perform at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song TPX IMAGES OF THE DAY

Lava flows and smoke rises following the eruption of a volcano on the Canary Island of La Palma, in Todoque, Spain, September 28, 2021. REUTERS/Nacho Doce

People reenact historical events during the commemoration of the 200th Anniversary of the Consummation of the Independence of Mexico outside the National Palace, in Mexico City, Mexico, September 27, 2021. REUTERS/Henry Romero

Spiders are seen inside a military fence near the demilitarised zone separating the two Koreas in Paju, South Korea, September 28, 2021. REUTERS/Kim Hong-Ji TPX IMAGES OF THE DAY

Korean Unification flags defaced by strong wind hang on a military fence near the demilitarized zone separating the two Koreas in Paju, South Korea, September 28, 2021. REUTERS/Kim Hong-Ji

Power lines are seen in front of electricity towers in Beijing, China September 28, 2021. REUTERS/Tingshu Wang

A man walks past power lines and electricity towers in Beijing, China September 28, 2021. REUTERS/Tingshu Wang

A Chinese flag flutters near power lines and electricity towers in Beijing, China September 28, 2021. REUTERS/Tingshu Wang

Fishermen work in front of a South Korea's observation post near the demilitarized zone separating the two Koreas in Paju, South Korea, September 28, 2021. REUTERS/Kim Hong-Ji

A South Korean soldier walks along a military fence near the demilitarized zone separating the two Koreas in Paju, South Korea, September 28, 2021. REUTERS/Kim Hong-Ji

People look towards the north from an observatory platform near the demilitarized zone separating the two Koreas in Paju, South Korea, September 28, 2021. REUTERS/Kim Hong-Ji

A father and his daughter wear masks to avoid contracting the coronavirus disease (COVID-19) as they walk on an empty parking lot of a park in Paju, South Korea, September 28, 2021. REUTERS/Kim Hong-Ji

A boy stands in between his parents as they look towards the north through a pair of binoculars near the demilitarized zone separating the two Koreas in Paju, South Korea, September 28, 2021. REUTERS/Kim Hong-Ji

A Wing Loong II armed drone takes part in the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

A Wing Loong II armed drone flies by surveillance cameras at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

A Wing Loong II armed drone takes part in the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

A sign is seen as lava flows (rear) following the eruption of a volcano on the Canary Island of La Palma, in La Laguna, Spain, September 28, 2021. The sign reads "except neighbors". REUTERS/Marco Trujillo REFILE - CORRECTING DATE

An arrow sign is seen on a road as lava flows (rear) following the eruption of a volcano on the Canary Island of La Palma, in La Laguna, Spain, September 28, 2021. REUTERS/Marco Trujillo REFILE - CORRECTING DATE

An AG600 amphibious aircraft takes part in the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

Lava flows and smoke rises following the eruption of a volcano on the Canary Island of La Palma, in Todoque, Spain, September 28, 2021. REUTERS/Nacho Doce

Lava flows and smoke rises following the eruption of a volcano on the Canary Island of La Palma, in Todoque, Spain, September 28, 2021. REUTERS/Nacho Doce

A man watches Chinese People's Liberation Army (PLA) Air Force Red Falcon aerobatic team perform at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

Jets of Chinese People's Liberation Army (PLA) Air Force Red Falcon aerobatic team perform at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

People watch Chinese People's Liberation Army (PLA) Air Force Red Falcon aerobatic team perform at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

Jets of Chinese People's Liberation Army (PLA) Air Force Red Falcon aerobatic team perform at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

A J-10 fighter jet of Chinese People's Liberation Army (PLA) Air Force Bayi aerobatic team is seen at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

People watch Chinese People's Liberation Army (PLA) Air Force Red Falcon aerobatic team perform at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

Shi'ite Muslim pilgrims read prayers as they commemorate the Arbaeen, in Kerbala, Iraq September 28, 2021. REUTERS/Abdullah Dhiaa Al-Deen

Shi'ite Muslim pilgrims read prayers as they commemorate the Arbaeen, in Kerbala, Iraq September 28, 2021. REUTERS/Abdullah Dhiaa Al-Deen

Shi'ite Muslim pilgrims read prayers as they commemorate the Arbaeen, in Kerbala, Iraq September 28, 2021. REUTERS/Abdullah Dhiaa Al-Deen

A Shi'ite Muslim pilgrim reads prayer on her mobile as they commemorate the Arbaeen, in Kerbala, Iraq September 28, 2021. REUTERS/Abdullah Dhiaa Al-Deen

Shi'ite Muslim pilgrims take part in a mourning ceremony, during the holy Shi'ite ritual of Arbaeen, in Kerbala, Iraq, September 28, 2021. REUTERS/Abdullah Dhiaa Al-Deen

Shi'ite Muslim pilgrims take part in a mourning ceremony, during the holy Shi'ite ritual of Arbaeen, in Kerbala, Iraq, September 28, 2021. REUTERS/Abdullah Dhiaa Al-Deen TPX IMAGES OF THE DAY

Shi'ite Muslim pilgrims take part in a mourning ceremony, during the holy Shi'ite ritual of Arbaeen, in Kerbala, Iraq, September 28, 2021. REUTERS/Abdullah Dhiaa Al-Deen

Shi'ite Muslim pilgrims take part in a mourning ceremony, during the holy Shi'ite ritual of Arbaeen, in Kerbala, Iraq, September 28, 2021. REUTERS/Abdullah Dhiaa Al-Deen

People reenact historical events during the commemoration of the 200th Anniversary of the Consummation of the Independence of Mexico outside the National Palace, in Mexico City, Mexico, September 27, 2021. REUTERS/Henry Romero

A CBJ business jet of Commercial Aircraft Corporation of China (COMAC) takes part in the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song

Men wearing historical military uniforms march during an event to commemorate the 200th Anniversary of the Consummation of the Independence of Mexico outside the National Palace, in Mexico City, Mexico, September 27, 2021. REUTERS/Henry Romero

Men wearing historical military uniforms participate in an event to commemorate the 200th Anniversary of the Consummation of the Independence of Mexico outside the National Palace, in Mexico City, Mexico, September 27, 2021. REUTERS/Henry Romero

Mexico's President Andres Manuel Lopez Obrador speaks during an event to commemorate the 200th Anniversary of the Consummation of the Independence of Mexico outside the National Palace, in Mexico City, Mexico, September 27, 2021. REUTERS/Henry Romero

Pilots operate a JL-10 advance trainer jet of Chinese People's Liberation Army (PLA) Air Force at the China International Aviation and Aerospace Exhibition, or Airshow China, in Zhuhai, Guangdong province, China September 28, 2021. REUTERS/Aly Song