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Concrete barriers that are part of Poland's East Shield fortification at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

Concrete barriers that are part of Poland's East Shield fortification at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

Concrete barriers that are part of Poland's East Shield fortification at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

Concrete barriers that are part of Poland's East Shield fortification at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

A Polish soldier at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

A Polish soldier at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

Concrete barriers that are part of Poland's East Shield fortification at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

Concrete barriers that are part of Poland's East Shield fortification at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

Poland's Prime Minister Donald Tusk speaks to reporters in Dabrowka, Poland, during a visit to Poland's border with Russia on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

Poland's Prime Minister Donald Tusk speaks to reporters in Dabrowka, Poland, during a visit to Poland's border with Russia on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

Concrete barriers that are part of Poland's East Shield fortification at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

Concrete barriers that are part of Poland's East Shield fortification at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

Poland's Prime Minister Donald Tusk speaks to reporters in Dabrowka, Poland, during a visit to Poland's border with Russia on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

Poland's Prime Minister Donald Tusk speaks to reporters in Dabrowka, Poland, during a visit to Poland's border with Russia on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

A Polish soldier at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

A Polish soldier at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

A Polish soldier at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

A Polish soldier at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

Concrete barriers that are part of Poland's East Shield fortification at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

Concrete barriers that are part of Poland's East Shield fortification at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

Concrete barriers that are part of Poland's East Shield fortification at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

Concrete barriers that are part of Poland's East Shield fortification at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

A Polish soldier at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

A Polish soldier at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

Concrete barriers that are part of Poland's East Shield fortification at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)

Concrete barriers that are part of Poland's East Shield fortification at Poland's border with Russia in Dabrowka, Poland, on Saturday Nov. 30, 2024. (AP Photo/Czarek Sokolowski)