US and Ukrainian national flags wave to commemorate American volunteers, who were killed in battles with Russian troops defending Ukraine, their names are on flags, at the improvised war memorial in Independence square in Kyiv, Ukraine, Friday, Sept. 27, 2024. (AP Photo/Efrem Lukatsky)

Volunteers put in order the site of an improvised memorial to fallen soldiers on Independence Square in Kyiv, Ukraine, Wednesday, May 15, 2024. (AP Photo/Efrem Lukatsky)

A Ukrainian soldier installs a small national flag on a grassed area at the Independence Square in Kyiv, Ukraine, Wednesday, May 1, 2024, to commemorate his fellow soldier killed in a battle with the Russian troops . (AP Photo/Efrem Lukatsky)

Volunteers put in order the site of an improvised memorial to fallen soldiers on Independence Square in Kyiv, Ukraine, Wednesday, May 15, 2024. (AP Photo/Efrem Lukatsky)

Ukrainian service men stand next to Ukrainian flags and photographs placed in memory of civilians and soldiers killed during the war, at the Independence square in central Kyiv, Saturday, April 20, 2024. (AP Photo/Francisco Seco)

Two woman look at Ukrainian flags placed in memory of civilians and soldiers killed during the war at the Independence Square in central Kyiv, Saturday, April 20, 2024. (AP Photo/Francisco Seco)

A child holds a balloon while looking at a memorial for soldiers who perished in the war in Kyiv, Ukraine, Thursday, March 14, 2024. (AP Photo/Vadim Ghirda)

Snow coats the photograph of a fallen Ukrainian serviceman in Independence Square in Kyiv, Ukraine Tuesday, March 12, 2024. (AP Photo/Vadim Ghirda)