Service members of pro-Russian troops are seen atop a self-propelled howitzer during Ukraine-Russia conflict outside Donetsk, Ukraine May 13, 2022. REUTERS/Alexander Ermochenko 

Service members of pro-Russian troops are seen atop a self-propelled howitzer during Ukraine-Russia conflict outside Donetsk, Ukraine May 13, 2022. REUTERS/Alexander Ermochenko 

Service members of pro-Russian troops are seen atop a self-propelled howitzer during Ukraine-Russia conflict outside Donetsk, Ukraine May 13, 2022. REUTERS/Alexander Ermochenko 

A customer scans an item as she pays for her purchases with self-checkout at an IKEA store in Nice, France, May 11, 2022. REUTERS/Eric Gaillard 

Russian service members are seen atop of MSTA-S self-propelled howitzers during a military parade on Victory Day, which marks the 77th anniversary of the victory over Nazi Germany in World War Two, in Red Square in central Moscow, Russia May 9, 2022. REUTERS/Evgenia Novozhenina 

A Ukrainian service member smokes as he sits inside a self-propelled howitzer 2S1 Gvozdika, as Russia's attack on Ukraine continues, in unknown location in Kharkiv region, Ukraine May 7, 2022. REUTERS/Serhii Nuzhnenko 

Ukrainian service members fire with a self-propelled howitzer 2S1 Gvozdika, as Russia's attack on Ukraine continues, in unknown location in Kharkiv region, Ukraine May 7, 2022. REUTERS/Serhii Nuzhnenko 

Ukrainian service members fire with self-propelled howitzers 2S1 Gvozdika, as Russia's attack on Ukraine continues, in unknown location in Kharkiv region, Ukraine May 7, 2022. REUTERS/Serhii Nuzhnenko 

Ukrainian service members fire with a self-propelled howitzer 2S1 Gvozdika, as Russia's attack on Ukraine continues, in unknown location in Kharkiv region, Ukraine May 7, 2022. REUTERS/Serhii Nuzhnenko 

Ukrainian service members sit in a self-propelled howitzer 2S1 Gvozdika, as Russia's attack on Ukraine continues, in unknown location in Kharkiv region, Ukraine May 7, 2022. REUTERS/Serhii Nuzhnenko 

A Ukrainian service member smokes as he sits inside a self-propelled howitzer 2S1 Gvozdika, as Russia's attack on Ukraine continues, in unknown location in Kharkiv region, Ukraine May 7, 2022. REUTERS/Serhii Nuzhnenko 

A Ukrainian service member sits inside a self-propelled howitzer 2S1 Gvozdika, as Russia's attack on Ukraine continues, in unknown location in Kharkiv region, Ukraine May 7, 2022. REUTERS/Serhii Nuzhnenko 

A Russian service member drives a MSTA-S self-propelled howitzer during a rehearsal for a military parade marking the anniversary of the victory over Nazi Germany in World War Two in Red Square in central Moscow, Russia May 7, 2022. REUTERS/Maxim Shemetov 

People attend a memorial service for Vladimir Zhoga, known by the nom de guerre Vokha, commander of the Sparta battalion of the separatist self-proclaimed Donetsk People's Republic, who was killed during Ukraine-Russia conflict, in Donetsk, Ukraine March 7, 2022. The inscription reads: "Hero of the Russian Federation". REUTERS/Alexander Ermochenko 

Members of the Sparta battalion of the separatist self-proclaimed Donetsk People's Republic walk next to the coffin of their commander Vladimir Zhoga, known by the nom de guerre Vokha, who was killed during Ukraine-Russia conflict, during a memorial service in Donetsk, Ukraine March 7, 2022. REUTERS/Alexander Ermochenko. 

Members of the Sparta battalion of the separatist self-proclaimed Donetsk People's Republic carry the coffin of their commander Vladimir Zhoga, known by the nom de guerre Vokha, who was killed during Ukraine-Russia conflict, during a memorial service in Donetsk, Ukraine March 7, 2022. REUTERS/Alexander Ermochenko. 

Members of the Sparta battalion of the separatist self-proclaimed Donetsk People's Republic stand next to the coffin of their commander Vladimir Zhoga, known by the nom de guerre Vokha, who was killed during Ukraine-Russia conflict, during a memorial service in Donetsk, Ukraine March 7, 2022. REUTERS/Alexander Ermochenko. 

Members of the Sparta battalion of the separatist self-proclaimed Donetsk People's Republic carry the coffin of their commander Vladimir Zhoga, known by the nom de guerre Vokha, who was killed during Ukraine-Russia conflict, during a memorial service in Donetsk, Ukraine March 7, 2022. REUTERS/Alexander Ermochenko. 

People attend a memorial service for Vladimir Zhoga, known by the nom de guerre Vokha, commander of the Sparta battalion of the separatist self-proclaimed Donetsk People's Republic, who was killed during Ukraine-Russia conflict, in Donetsk, Ukraine March 7, 2022. REUTERS/Alexander Ermochenko 

Head of the separatist self-proclaimed Donetsk People's Republic (DNR) Denis Pushilin attends a memorial service for Vladimir Zhoga, known by the nom de guerre Vokha, commander of the Sparta battalion of DNR, who was killed during Ukraine-Russia conflict, in Donetsk, Ukraine March 7, 2022. REUTERS/Alexander Ermochenko 

A service member of pro-Russian troops in a uniform without insignia holds flowers before a memorial service for Vladimir Zhoga, known by the nom de guerre Vokha, commander of the Sparta battalion of the separatist self-proclaimed Donetsk People's Republic, who was killed during Ukraine-Russia conflict, in Donetsk, Ukraine March 7, 2022. REUTERS/Alexander Ermochenko 

Service members of pro-Russian troops hold flowers before a memorial service for Vladimir Zhoga, known by the nom de guerre Vokha, commander of the Sparta battalion of the separatist self-proclaimed Donetsk People's Republic, who was killed during Ukraine-Russia conflict, in Donetsk, Ukraine March 7, 2022. REUTERS/Alexander Ermochenko 

Service members of pro-Russian troops arrive at a memorial service for Vladimir Zhoga, known by the nom de guerre Vokha, commander of the Sparta battalion of the separatist self-proclaimed Donetsk People's Republic, who was killed during Ukraine-Russia conflict, in Donetsk, Ukraine March 7, 2022. REUTERS/Alexander Ermochenko 

Service members of pro-Russian troops in uniforms without insignia walk before a memorial service for Vladimir Zhoga, known by the nom de guerre Vokha, commander of the Sparta battalion of the separatist self-proclaimed Donetsk People's Republic, who was killed during Ukraine-Russia conflict, in Donetsk, Ukraine March 7, 2022. REUTERS/Alexander Ermochenko TPX IMAGES OF THE DAY 

A service member of the Ukrainian armed forces conceals a self-propelled howitzer at positions following Russia's invasion of Ukraine, near the settlement of Makariv, Ukraine, March 6, 2022. REUTERS/Maksim Levin 

A service member of the Ukrainian armed forces carries empty shells from a self-propelled howitzer at positions following Russia's invasion of Ukraine, near the settlement of Makariv, Ukraine, March 6, 2022. REUTERS/Maksim Levin 

A service member of the Ukrainian armed forces load shells inside a self-propelled howitzer at positions following Russia's invasion of Ukraine, near the settlement of Makariv, Ukraine, March 6, 2022. REUTERS/Maksim Levin 

Ukrainian armed forces self-propelled howitzers fire at positions following Russia's invasion of Ukraine, near the settlement of Makariv, Ukraine March 6, 2022. REUTERS/Maksim Levin 

Ukrainian armed forces self-propelled howitzers fire at positions following Russia's invasion of Ukraine, near the settlement of Makariv, Ukraine March 6, 2022. REUTERS/Maksim Levin 

A service member of the Ukrainian armed forces carries an empty shell from a self-propelled howitzer at positions following Russia's invasion of Ukraine, near the settlement of Makariv, Ukraine, March 6, 2022. REUTERS/Maksim Levin 

A service member of the Ukrainian armed forces conceals a self-propelled howitzer at positions following Russia's invasion of Ukraine, near the settlement of Makariv, Ukraine, March 6, 2022. REUTERS/Maksim Levin 

A militant of the self-proclaimed Donetsk People's Republic stands next to buses arranged to transport local residents mobilized for military service, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in the separatist-controlled city of Donetsk, Ukraine February 24, 2022. REUTERS/Alexander Ermochenko 

Militants of the self-proclaimed Donetsk People's Republic are seen next to buses arranged to transport local residents mobilized for military service, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in the separatist-controlled city of Donetsk, Ukraine February 24, 2022. REUTERS/Alexander Ermochenko 

A woman walks past a building in a street in the separatist-controlled city of Donetsk, Ukraine February 21, 2022. A placard on a door window shows the distinction marks of the self-proclaimed Donetsk People's Republic and a slogan, which reads: "Stand up to defend Fatherland!" REUTERS/Alexander Ermochenko 

A woman approaches an ATM money machine in the separatist-controlled city of Donetsk, Ukraine February 21, 2022. A placard shows the distinction marks of the self-proclaimed Donetsk People's Republic and a slogan reads: "Victory will be ours". REUTERS/Alexander Ermochenko 

A self service area provides daily essentials for the guests at a hotel for journalists and officials inside the Thaiwoo Ski Resort during the Beijing 2022 Winter Olympics in Zhangjiakou, China, February 13, 2022. REUTERS/Kai Pfaffenbach 

Service members of the Ukrainian armed forces drive a self-propelled rocket launcher along a pontoon bridge while crossing the Aidar River during military drills near Novoaidar in the Luhansk region, Ukraine, December 14, 2021. REUTERS/Oleksandr Klymenko 

Baidu's Apollo car with an autonomous driving system, which serves for self-driving taxi services, is seen at the Shougang Industry Park in Beijing, China July 30, 2021. REUTERS/Tingshu Wang 

A member of Japan Self-Defense Force gestures at an emergency care service against allergy risks at a mass vaccination coronavirus disease (COVID-19) site in Tokyo, Japan June 9, 2021. David Mareuil/Pool via REUTERS 

Russian service members drive MSTA-S and Koalitsiya-SV self-propelled howitzers during a military parade on Victory Day, which marks the 76th anniversary of the victory over Nazi Germany in World War Two, in Red Square in central Moscow, Russia May 9, 2021. REUTERS/Maxim Shemetov 

Russian service members drive a MSTA-S self-propelled howitzer during a military parade on Victory Day, which marks the 76th anniversary of the victory over Nazi Germany in World War Two, in Red Square in central Moscow, Russia May 9, 2021. REUTERS/Maxim Shemetov 

People sit on the terrace of a self-service restaurant, as the spread of the coronavirus disease (COVID-19) continues, on Mount Titlis near the Alpine resort of Engelberg, Switzerland May 8, 2021. REUTERS/Arnd Wiegmann 

People sit on the terrace of a self-service restaurant, as the spread of the coronavirus disease (COVID-19) continues, on Mount Titlis near the Alpine resort of Engelberg, Switzerland May 8, 2021. REUTERS/Arnd Wiegmann 

A clergyman conducts a service at the grave of a militant killed in a recent conflict between the armed forces of the self-proclaimed Donetsk People's Republic and Ukraine near the World War Two memorial Savur-Mohyla (Saur-Mogila) on the eve of Victory Day, which marks the 76th anniversary of the victory over Nazi Germany, in Donetsk Region, Ukraine May 8, 2021. REUTERS/Alexander Ermochenko 

People eat lunch at a self-service restaurant that reopened after the easing of restrictions with the implementation of social distancing measures to prevent the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey March 2, 2021. REUTERS/Murad Sezer 

A man eats lunch at a self-service restaurant that reopened after the easing of restrictions with the implementation of social distancing measures to prevent the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey March 2, 2021.REUTERS/Murad Sezer 

A man eats lunch at a self-service restaurant that reopened after the easing of restrictions with the implementation of social distancing measures to prevent the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey March 2, 2021.REUTERS/Murad Sezer 

A cinema employee cleans a self-service ticket kiosk as Quebec allows the reopening of theatres but not the selling of food and drinks, which includes popcorn, during the outbreak of the coronavirus disease (COVID-19) in Kirkland, a suburb of Montreal, Canada February 27, 2021. REUTERS/Christinne Muschi 

A clergyman walks outside the Iversky monastery, which was heavily damaged by artillery and gun fire during a battle for a local airport between the armed forces of Ukraine and the separatist self-proclaimed Donetsk People's Republic, following a service in Donetsk, Ukraine, February 25, 2021. REUTERS/Alexander Ermochenko 

A woman walks outside the Iversky monastery, which was heavily damaged by artillery and gun fire in the course of a battle for a local airport between the armed forces of Ukraine and the separatist self-proclaimed Donetsk People's Republic, following a service in Donetsk, Ukraine, February 25, 2021. REUTERS/Alexander Ermochenko 

A woman walks outside the Iversky monastery, which was heavily damaged by artillery and gun fire in the course of a battle for a local airport between the armed forces of Ukraine and the separatist self-proclaimed Donetsk People's Republic, during a service in Donetsk, Ukraine, February 25, 2021. REUTERS/Alexander Ermochenko 

Clergymen take part in a service at the Iversky monastery, which was heavily damaged by artillery and gun fire during a battle for a local airport between the armed forces of Ukraine and the separatist self-proclaimed Donetsk People's Republic, in Donetsk, Ukraine, February 25, 2021. REUTERS/Alexander Ermochenko 

A view shows an icon during a service outside the Iversky monastery, which was heavily damaged by artillery and gun fire in the course of a battle for a local airport between the armed forces of Ukraine and the separatist self-proclaimed Donetsk People's Republic, in Donetsk, Ukraine, February 25, 2021. REUTERS/Alexander Ermochenko 

People take part in a service outside the Iversky monastery, which was heavily damaged by artillery and gun fire during a battle for a local airport between the armed forces of Ukraine and the separatist self-proclaimed Donetsk People's Republic, in Donetsk, Ukraine, February 25, 2021. REUTERS/Alexander Ermochenko 

A passenger is seen at the self service check-in counter at the O.R. Tambo International Airport in Johannesburg, South Africa, December 22, 2020. REUTERS/Siphiwe Sibeko 

A woman wearing a protective face mask passes self-service check-in machines at Changi Airport in Singapore December 8, 2020. REUTERS/Edgar Su 

Customers receive their food at the self-service counter in the Yaoji Chaogan traditional Beijing cuisine restaurant, which then-Vice President Joe Biden visited in 2011, in Beijing, China, November 9, 2020. REUTERS/Thomas Peter 

People buy tickets for a movie session at a self-service kiosk during the reopening of cinemas, amid the outbreak of the coronavirus disease (COVID-19), in Rio de Janeiro, Brazil October 1, 2020. REUTERS/Pilar Olivares 

You Young-sik who runs a tear down service, is seen during a tear down of a private institute in Anseong, South Korea, September 5, 2020. Picture taken on September 5, 2020. REUTERS/Kim Hong-Ji REFILE - CORRECTING SPELLING OF A SURNAME 

Service members of the self-proclaimed Donetsk People's Republic (DNR) sit next to a howitzer during military exercises at a target range outside Donetsk, Ukraine August 25, 2020. REUTERS/Alexander Ermochenko