A Ukrainian reacts after being released in a prisoner exchange at an undisclosed location in Ukraine, Saturday Sept. 14, 2024. (Ukrainian Presidential Press Office via AP)

Ukrainians pose for a photo after being released in a prisoner exchange at an undisclosed location in Ukraine, Saturday Sept. 14, 2024. (Ukrainian Presidential Press Office via AP)

Ukrainians pose for a photo after being released in a prisoner exchange at an undisclosed location in Ukraine, Saturday Sept. 14, 2024. (Ukrainian Presidential Press Office via AP)

A Ukrainian poses for a selfie as he is greeted after being released in a prisoner exchange at an undisclosed location in Ukraine, Saturday Sept. 14, 2024. (Ukrainian Presidential Press Office via AP)

A Ukrainian serviceman, left, is greeted after being released in a prisoner exchange at an undisclosed location in Ukraine, Saturday Sept. 14, 2024. (Ukrainian Presidential Press Office via AP)

Ukrainians pose for a photo after being released in a prisoner exchange at an undisclosed location in Ukraine, Saturday Sept. 14, 2024. (Ukrainian Presidential Press Office via AP)

Ukrainians react after being released in a prisoner exchange at an undisclosed location in Ukraine, Saturday Sept. 14, 2024. (Ukrainian Presidential Press Office via AP)