This satellite photo from Planet Labs PBC shows a damaged hangar at the Borisoglebsk Air Base in Russia after an attack by Ukrainian drones on Wednesday, Aug. 14, 2024. (Planet Labs PBC via AP)
Ukrainian servicemen ride atop a tank after returning from Russia near the Russian-Ukrainian border in Sumy region, Ukraine, Thursday, Aug. 15, 2024. (AP Photo/Evgeniy Maloletka)
Ukrainian servicemen ride a motorcycle towards the Russian-Ukrainian border in Sumy region, Ukraine, Thursday, Aug. 15, 2024. (AP Photo/Evgeniy Maloletka)
This satellite photo from Planet Labs PBC shows damaged fighter jets at the Borisoglebsk Air Base in Russia after an attack by Ukrainian drones on Wednesday, Aug. 14, 2024. (Planet Labs PBC via AP)
Ukrainian servicemen disconnect cables from a tank after returning from Russia near the Russian-Ukrainian border in Sumy region, Ukraine, Thursday, Aug. 15, 2024. (AP Photo/Evgeniy Maloletka)
This satellite photo from Planet Labs PBC shows the Borisoglebsk Air Base in Russia after an attack by Ukrainian drones on Wednesday, Aug. 14, 2024. (Planet Labs PBC via AP)
Ukrainian serviceman ride atop a trophy tank after returning from Russia near the Russian-Ukrainian border in Sumy region, Ukraine, Thursday, Aug. 15, 2024. (AP Photo/Evgeniy Maloletka)
A Ukrainian tank passes by a burning car near the Russian-Ukrainian border, Sumy region, Ukraine, Wednesday, Aug. 14, 2024. (AP Photo/Evgeniy Maloletka)
This satellite photo from Planet Labs PBC shows a damaged hangar at the Borisoglebsk Air Base in Russia after an attack by Ukrainian drones on Wednesday, Aug. 14, 2024. (Planet Labs PBC via AP)
People cover a roof with tarps after their house was hit by Russian airstrike near the Russian-Ukrainian border in Sumy region, Ukraine, Thursday, Aug. 15, 2024. (AP Photo/Evgeniy Maloletka)
In this photo provided by the Ukrainian Security Service Press Office, over 100 Russian prisoners of war captured by a Security Service special unit during one military action are seen in a shelter in Kursk region, Russia, Wednesday, Aug. 14, 2024. (Ukrainian Security Service Press Office via AP)
In this photo taken from a video released by the Russian Defense Ministry on Thursday, Aug. 15, 2024, Russian soldiers load Giatsint-B self-propelled gun at an undisclosed location. (Russian Defense Ministry Press Service photo via AP)
An elderly woman walks along the road near the Russian-Ukrainian border, Sumy region, Ukraine, Wednesday, Aug. 14, 2024. (AP Photo/Evgeniy Maloletka)
In this photo provided by the Ukrainian Security Service Press Office, over 100 Russian prisoners of war captured by a Security Service special unit during one military action are seen in a shelter in Kursk region, Russia, Wednesday, Aug. 14, 2024. (Ukrainian Security Service Press Office via AP)
A damaged Ukrainian tank returns from Russia near the Russian-Ukrainian border in Sumy region, Ukraine, Thursday, Aug. 15, 2024. (AP Photo/Evgeniy Maloletka)
Ukrainian servicemen ride atop a tank, bringing with them a sign reading "Lubimovka" village, after returning from Russia near the Russian-Ukrainian border in Sumy region, Ukraine, Thursday, Aug. 15, 2024. (AP Photo/Evgeniy Maloletka)
Explosions are seen in the horizon after Russian airstrikes near the Russian-Ukrainian border in Sumy region, Ukraine, Thursday, Aug. 15, 2024. (AP Photo/Evgeniy Maloletka)
Ukrainian serviceman ride atop a trophy tank after returning from Russia near the Russian-Ukrainian border in Sumy region, Ukraine, Thursday, Aug. 15, 2024. (AP Photo/Evgeniy Maloletka)
People cover a roof with tarps after their house was hit by a Russian airstrike near the Russian-Ukrainian border in Sumy region, Ukraine, Thursday, Aug. 15, 2024. (AP Photo/Evgeniy Maloletka)