FILE - Ukrainian soldiers fire toward Russian positions at the front line in Donetsk region, Ukraine, Monday, June 24, 2024. (AP Photo/Evgeniy Maloletka, File)

FILE - Rescuers, volunteers and medical workers clean up the rubble and search for victims after a Russian missile hit the country's main children's hospital Okhmadit, in Kyiv, Ukraine, Monday, July 8, 2024. (AP Photo/Efrem Lukatsky, File)

FILE - A boy holds on to the barrel of a tank, part of a display of destroyed Russian military equipment, in Kyiv, Ukraine, Sunday, March 31, 2024. (AP Photo/Vadim Ghirda, File)

FILE - A Ukrainian soldier walks near Klishchyivka, Donetsk region, Ukraine, Monday, March 18, 2024. (Iryna Rybakova via AP, File)

FILE - A Ukrainian police officer takes cover in front of a burning building that was hit in a Russian airstrike in Avdiivka, Ukraine, Friday, March 17, 2023. (AP Photo/Evgeniy Maloletka, File)

FILE - Smoke rises from a building in Bakhmut, the site of the heaviest battles with the Russian troops in the Donetsk region, Ukraine, Wednesday, April 26, 2023. (AP Photo/Libkos, File)

FILE - A Ukrainian assault unit commander passes by a dead Russian soldier on the front line near Andriivka, Ukraine, Saturday, Sept. 16, 2023. (AP Photo/Alex Babenko, File)

FILE - US President Joe Biden, left, participates in a wreath laying ceremony with Ukrainian President Volodymyr Zelenskyy at the memorial wall outside of St. Michael's Golden-Domed Cathedral during an unannounced visit, in Kyiv, Ukraine, Monday, Feb. 20, 2023. (AP Photo/Evan Vucci, File)