A U.S. army soldier prepares for a live-fire drill which is a part of the joint military drill "Freedom Shield" between South Korea and U.S. at a military training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 22, 2023. REUTERS/Kim Hong-Ji 

A South Korean army K1A1 tank fires during a live-fire drill which is a part of the joint military drill "Freedom Shield" between South Korea and U.S. at a military training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 22, 2023. REUTERS/Kim Hong-Ji 

U.S. army soldiers prepare for a live-fire drill which is a part of the joint military drill "Freedom Shield" between South Korea and U.S. at a military training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 22, 2023. REUTERS/Kim Hong-Ji 

A U.S. army soldier rests before a live-fire drill which is a part of the joint military drill "Freedom Shield" between South Korea and U.S. at a military training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 22, 2023. REUTERS/Kim Hong-Ji 

A South Korean army K1A1 tank fires during a live-fire drill which is a part of the joint military drill "Freedom Shield" between South Korea and U.S. at a military training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 22, 2023. REUTERS/Kim Hong-Ji 

U.S. army soldiers take part in a live-fire drill which is a part of the joint military drill "Freedom Shield" between South Korea and U.S. at a military training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 22, 2023. REUTERS/Kim Hong-Ji 

U.S. army soldiers prepare for a live-fire drill which is a part of the joint military drill "Freedom Shield" between South Korea and U.S. at a military training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 22, 2023. REUTERS/Kim Hong-Ji 

South Korean and U.S. army soldiers pose for a group photo with South Korean army K1A1 tanks before a live-fire drill which is a part of the joint military drill "Freedom Shield" between South Korea and U.S. at a military training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 22, 2023. REUTERS/Kim Hong-Ji 

Bullets are pictured as U.S. army soldiers prepare for a live-fire drill which is a part of the joint military drill "Freedom Shield" between South Korea and U.S. at a military training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 22, 2023. REUTERS/Kim Hong-Ji 

A U.S. army soldier walks past their gears as they prepare for a live-fire drill which is a part of the joint military drill "Freedom Shield" between South Korea and U.S. at a military training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 22, 2023. REUTERS/Kim Hong-Ji 

South Korean army K1A1 tank fires during a live-fire drill which is a part of the joint military drill "Freedom Shield" between South Korea and U.S. at a military training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 22, 2023. REUTERS/Kim Hong-Ji TPX IMAGES OF THE DAY 

U.S. army soldiers prepare for a live-fire drill which is a part of the joint military drill "Freedom Shield" between South Korea and U.S. at a military training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 22, 2023. REUTERS/Kim Hong-Ji 

A U.S. national flag is seen on the back of a U.S. army soldier taking part in a live-fire drill which is a part of the joint military drill "Freedom Shield" between South Korea and U.S. at a military training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 22, 2023. REUTERS/Kim Hong-Ji 

U.S. army soldiers prepare for a live-fire drill which is a part of the joint military drill "Freedom Shield" between South Korea and U.S. at a military training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 22, 2023. REUTERS/Kim Hong-Ji 

Ministry of Defence of the Slovak Republic Jaroslav Nad and General Lubomir Svoboda attend a drill during the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

A view of a military aircraft during the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

Soldiers take part in the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

Ministry of Defence of the Slovak Republic Jaroslav Nad and General Lubomir Svoboda attend a drill during the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

Ministry of Defence of the Slovak Republic Jaroslav Nad and General Lubomir Svoboda attend a drill during the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

A view of a military aircraft along with flags during the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

Soldiers take part in the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

A view of military vehicles during the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

Soldiers take part in the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

Soldiers take part in the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

A view of military vehicles during the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

A view of a military aircraft during the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

Soldiers take part in the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

A view of a military vehicle during the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

A view of a military vehicle during the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

Soldiers take part in the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

A view of a military aircraft during the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

Soldiers take part in the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

Soldiers take part in the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

Soldiers take part in the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

Soldiers take part in the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

Soldiers take part in the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa REFILE- QUALITY REPEAT 

Soldiers take part in the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

Soldiers take part in the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

A soldier takes part in the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

A view of military vehicles during the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

A soldier takes part in the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa REFILE- QUALITY REPEAT 

Soldiers take part in the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

A soldier is carried inside a vehicle during the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

A view of an unmanned aerial vehicle during the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

A view of aircraft during the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

Soldiers attend NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

Soldiers take part in the NATO multinational battle group military exercise Slovak Shields 2023 at a military training area in Lest, near the town of Zvolen, Slovakia, March 21, 2023. REUTERS/Radovan Stoklasa 

U.S. soldiers take part in a military exercise which is a part of the Freedom Shield joint military exercise between South Korea and U.S., at a training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 19, 2023. REUTERS/Kim Hong-Ji 

U.S. soldiers work on M777 howitzer during a military exercise which is a part of the Freedom Shield joint military exercise between South Korea and U.S., at a training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 19, 2023. REUTERS/Kim Hong-Ji 

A U.S Army CH-47 Chinook transports a M777 howitzer during a military exercise which is a part of the Freedom Shield joint military exercise between South Korea and U.S., at a training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 19, 2023. REUTERS/Kim Hong-Ji 

U.S. soldiers take part in a military exercise which is a part of the Freedom Shield joint military exercise between South Korea and U.S., at a training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 19, 2023. REUTERS/Kim Hong-Ji 

U.S. soldiers withstand strong wind as a U.S Army CH-47 Chinook prepare to land during a military exercise which is a part of the Freedom Shield joint military exercise between South Korea and U.S., at a training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 19, 2023. REUTERS/Kim Hong-Ji 

U.S. soldiers take part in a military exercise which is a part of the Freedom Shield joint military exercise between South Korea and U.S., at a training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 19, 2023. REUTERS/Kim Hong-Ji 

U.S. soldiers work on M777 howitzer during a military exercise which is a part of the Freedom Shield joint military exercise between South Korea and U.S., at a training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 19, 2023. REUTERS/Kim Hong-Ji 

U.S. soldiers withstand strong wind caused by U.S Army CH-47 Chinooks during a military exercise which is a part of the Freedom Shield joint military exercise between South Korea and U.S., at a training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 19, 2023. REUTERS/Kim Hong-Ji 

Dead leaves are scattered as a U.S Army CH-47 Chinook transporting a M777 howitzer prepares to land during a military exercise which is a part of the Freedom Shield joint military exercise between South Korea and U.S., at a training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 19, 2023. REUTERS/Kim Hong-Ji 

U.S. soldiers take part in a military exercise which is a part of the Freedom Shield joint military exercise between South Korea and U.S., at a training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 19, 2023. REUTERS/Kim Hong-Ji 

Dead leaves are scattered as a U.S Army CH-47 Chinook transporting a M777 howitzer prepares to land during a military exercise which is a part of the Freedom Shield joint military exercise between South Korea and U.S., at a training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 19, 2023. REUTERS/Kim Hong-Ji TPX IMAGES OF THE DAY 

U.S. soldiers work on M777 howitzer during a military exercise which is a part of the Freedom Shield joint military exercise between South Korea and U.S., at a training field near the demilitarized zone separating the two Koreas in Pocheon, South Korea, March 19, 2023. REUTERS/Kim Hong-Ji 

A soldier removes a an engine from a military vehicle as German Defence Minister Boris Pistorius visits a training site of German army Bundeswehr in Mahlwinkel, near Magdeburg, in Germany March 16, 2023. REUTERS/Fabian Bimmer