Employees work on Puma fighting vehicles at a production line at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

An employee works on a Lynx fighting vehicle at a production line at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

A Lynx fighting vehicle is pictured at a production line at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

Puma fighting vehicles are pictured at a production line at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

Employees work on Lynx fighting vehicles at a production line at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

The logo of Rheinmetall is seen at a production line of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour at the company’s plant in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

An employee works at a production line of 155 mm artillery shells at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

155 mm artillery shells are pictured at a production line at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

An employee works at a production line of 155 mm artillery shells at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

Employees work at a production line of 155 mm artillery shells at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

An employee works at a production line of 155 mm artillery shells at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

An employee works at a production line of 155 mm artillery shells at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

An employee works at a production line of 155 mm artillery shells at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

Refurbished self-propelled guns, Panzerhaubitze 2000, are pictured at a production line of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour at the company’s plant in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

An employee works at a production line of 155 mm artillery shells at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

An employee works at a production line of 155 mm artillery shells at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

An employee works at a production line of 155 mm artillery shells at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

An employee works at a production line of 120 mm tank ammunition at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

An employee works at a production line of 120 mm tank ammunition at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

Boxes with 120 mm tank ammunition are pictured at a production line at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

An employee refurbishes a Leopard tank at a production line of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour at the company’s plant in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

120 mm tank ammunition is pictured at a production line at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

Tank gun barrels and towers for Leopard 2A 4 tanks are pictured beside a production line of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour at the company’s plant in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

Employees work at a production line of 120 mm tank ammunition at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

120 mm tank ammunition is pictured at a production line at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

Tank gun barrels for Leopard 2A 4 tanks are pictured at a production line of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour at the company’s plant in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

An employee works at a production line of 120 mm tank ammunition at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

An employee works at a production line of 120 mm tank ammunition at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

An employee works at a production line of 120 mm tank ammunition at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

An employee works at a production line of 120 mm tank ammunition at the plant of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

Tank gun barrels for Leopard 2A 4 tanks are pictured at a production line of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour at the company’s plant in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

Tank gun barrels for Leopard 2A 4 tanks are pictured at a production line of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour at the company’s plant in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

Tank gun barrels for Leopard 2A 4 tanks are pictured at a production line of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour at the company’s plant in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

Tank gun barrels for Leopard 2A 4 tanks are pictured at a production line of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour at the company’s plant in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

Tank gun barrels for Leopard 2A 4 tanks are pictured at a production line of German company Rheinmetall, which produces weapons and ammunition for tanks and artillery, during a media tour at the company’s plant in Unterluess, Germany, June 6, 2023. REUTERS/Fabian Bimmer 

Ukrainian service members of the 55th Separate Artillery Brigade stand next to a Vampire multiple launch rocket system before firing towards Russian troops, amid Russia's attack on Ukraine, near the town of Avdiivka in Donetsk region, Ukraine May 31, 2023. REUTERS/Viacheslav Ratynskyi 

Ukrainian service members of the 55th Separate Artillery Brigade prepare a Vampire multiple launch rocket system for firing towards Russian troops, amid Russia's attack on Ukraine, near the town of Avdiivka in Donetsk region, Ukraine May 31, 2023. REUTERS/Viacheslav Ratynskyi 

A Ukrainian service member of the 55th Separate Artillery Brigade prepare carries a shell for a Caesar self-propelled howitzer before firing towards Russian troops, amid Russia's attack on Ukraine, near the town of Avdiivka in Donetsk region, Ukraine May 31, 2023. REUTERS/Viacheslav Ratynskyi 

A Ukrainian service member of the 55th Separate Artillery Brigade prepare carries a shell for a Caesar self-propelled howitzer before firing towards Russian troops, amid Russia's attack on Ukraine, near the town of Avdiivka in Donetsk region, Ukraine May 31, 2023. REUTERS/Viacheslav Ratynskyi 

Ukrainian service members of the 55th Separate Artillery Brigade fire a Caesar self-propelled howitzer towards Russian troops, amid Russia's attack on Ukraine, near the town of Avdiivka in Donetsk region, Ukraine May 31, 2023. REUTERS/Viacheslav Ratynskyi 

Ukrainian service members of the 55th Separate Artillery Brigade prepare a Caesar self-propelled howitzer for firing towards Russian troops, amid Russia's attack on Ukraine, near the town of Avdiivka in Donetsk region, Ukraine May 31, 2023. REUTERS/Viacheslav Ratynskyi 

Ukrainian service members of the 55th Separate Artillery Brigade stand next to a Caesar self-propelled howitzer before firing towards Russian troops, amid Russia's attack on Ukraine, near the town of Avdiivka in Donetsk region, Ukraine May 31, 2023. REUTERS/Viacheslav Ratynskyi 

Ukrainian service members of the 55th Separate Artillery Brigade fire a Vampire multiple launch rocket system towards Russian troops, amid Russia's attack on Ukraine, near the town of Avdiivka in Donetsk region, Ukraine May 31, 2023. REUTERS/Viacheslav Ratynskyi 

Ukrainian service members of the 55th Separate Artillery Brigade fire a Vampire multiple launch rocket system towards Russian troops, amid Russia's attack on Ukraine, near the town of Avdiivka in Donetsk region, Ukraine May 31, 2023. REUTERS/Viacheslav Ratynskyi 

A Caesar self-propelled howitzer of the 55th Separate Artillery Brigade is seen before firing towards Russian troops, amid Russia's attack on Ukraine, near the town of Avdiivka in Donetsk region, Ukraine May 31, 2023. REUTERS/Viacheslav Ratynskyi 

A shell is seen in an ammo compartment of a Caesar self-propelled howitzer of the 55th Separate Artillery Brigade, amid Russia's attack on Ukraine, near the town of Avdiivka in Donetsk region, Ukraine May 31, 2023. REUTERS/Viacheslav Ratynskyi 

Ukrainian service members of the 55th Separate Artillery Brigade fire a Caesar self-propelled howitzer towards Russian troops, amid Russia's attack on Ukraine, near the town of Avdiivka in Donetsk region, Ukraine May 31, 2023. REUTERS/Viacheslav Ratynskyi 

A Caesar self-propelled howitzer of the 55th Separate Artillery Brigade is seen after firing towards Russian troops, amid Russia's attack on Ukraine, near the town of Avdiivka in Donetsk region, Ukraine May 31, 2023. REUTERS/Viacheslav Ratynskyi 

Ukrainian service members of the 55th Separate Artillery Brigade fire a Caesar self-propelled howitzer towards Russian troops, amid Russia's attack on Ukraine, near the town of Avdiivka in Donetsk region, Ukraine May 31, 2023. REUTERS/Viacheslav Ratynskyi TPX IMAGES OF THE DAY 

A Ukrainian service member of the 55th Separate Artillery Brigade walks next to a Caesar self-propelled howitzer after firing towards Russian troops, amid Russia's attack on Ukraine, near the town of Avdiivka in Donetsk region, Ukraine May 31, 2023. REUTERS/Viacheslav Ratynskyi 

A Caesar self-propelled howitzer of the 55th Separate Artillery Brigade is seen after firing towards Russian troops, amid Russia's attack on Ukraine, near the town of Avdiivka in Donetsk region, Ukraine May 31, 2023. REUTERS/Viacheslav Ratynskyi 

Ukrainian service members of the 55th Separate Artillery Brigade stand next to a Caesar self-propelled howitzer before firing towards Russian troops, amid Russia's attack on Ukraine, near the town of Avdiivka in Donetsk region, Ukraine May 31, 2023. REUTERS/Viacheslav Ratynskyi 

Ukrainian service member of the anti-aircraft, missile and artillery division of the 57th separate motorised infantry brigade, checks the area at his position, amid Russia's attack on Ukraine, near the town of Chasiv Yar in Donetsk region, Ukraine May 17, 2023. REUTERS/Sofiia Gatilova 

Ukrainian service member of the anti-aircraft, missile and artillery division of the 57th separate motorised infantry brigade, smokes at his position, amid Russia's attack on Ukraine, near the town of Chasiv Yar in Donetsk region, Ukraine May 17, 2023. REUTERS/Sofiia Gatilova 

Ukrainian service member of the anti-aircraft, missile and artillery division of the 57th separate motorised infantry brigade, looks at a catalog with pictures of Russian drones, amid Russia's attack on Ukraine, at his position near the town of Chasiv Yar in Donetsk region, Ukraine May 17, 2023. REUTERS/Sofiia Gatilova 

Ukrainian service member of the anti-aircraft, missile and artillery division of the 57th separate motorised infantry brigade, checks the area at his position, amid Russia's attack on Ukraine, near the town of Chasiv Yar in Donetsk region, Ukraine May 17, 2023. REUTERS/Sofiia Gatilova 

Polish soldiers stand in front of the HIMARS system during an event marking the delivery of the first HIMARS (High Mobility Artillery Rocket System) to the Polish Army at the airport in Warsaw, Poland May 15, 2023. REUTERS/Kacper Pempel 

Poland's Defence Minister Mariusz Blaszczak speaks in front of the HIMARS system during an event marking the delivery of the first HIMARS (High Mobility Artillery Rocket System) to the Polish Army at the airport in Warsaw, Poland May 15, 2023. REUTERS/Kacper Pempel 

HIMARS system is seen during an event marking the delivery of the first HIMARS (High Mobility Artillery Rocket System) to the Polish Army at the airport in Warsaw, Poland May 15, 2023. REUTERS/Kacper Pempel 

Poland's Defence Minister Mariusz Blaszczak walks in front of the HIMARS system during an event marking the delivery of the first HIMARS (High Mobility Artillery Rocket System) to the Polish Army at the airport in Warsaw, Poland May 15, 2023. REUTERS/Kacper Pempel