FILE - In this photo released by the Russian Defense Ministry Press Service on Tuesday, June 25, 2024, Russian soldiers fire from an undisclosed location in Ukraine. Russia has taken advantage of its edge in firepower amid delays in U.S. aid to scale up attacks in several areas along the 1,000-kilometer (600-mile) front. (Russian Defense Ministry Press Service via AP, File)
FILE – A newly recruited soldier trains in Kyiv, Ukraine, on Friday, May 17, 2024. Slowly but steadily this summer, Russian troops are forging through Ukraine's defenses in a relentless onslaught, prompting the West to push for new weapons and strategies to shore up Kyiv. (AP Photo/Efrem Lukatsky, File)
FILE - Ukrainian soldiers carry shells to fire at Russian positions on the front line, near the city of Bakhmut, in Ukraine's Donetsk region, on March 25, 2024. Russia has made incremental but steady advances in Donetsk, and Putin has declared that Moscow isn’t seeking quick gains and would stick to the current strategy of advancing slowly. (AP Photo/Efrem Lukatsky, File)
FILE - Russian President Vladimir Putin speaks during a meeting at the Foreign Ministry in Moscow, on Friday, June 14, 2024. Putin says that Moscow isn't seeking quick gains in Ukraine and will stick to the current strategy of slow advances as it presses a grinding summer offensive. (AP Photo/Alexander Zemlianichenko, File)
FILE - Ukrainian soldiers ride in a combat vehicle near the front line in the Kharkiv region of Ukraine, on Tuesday, June 18, 2024. Russia's offensive near the city of Kharkiv that began in May has apparently lost momentum after Ukraine bolstered its forces in the area by redeploying troops there from other sectors. (AP Photo/Andrii Marienko, File)
FILE - Ukrainian soldiers fire on Russian positions along the front line in the Donetsk region of Ukraine on Monday, June 24, 2024. Russia has made incremental but steady advances in Donetsk, and Putin has declared that Moscow isn’t seeking quick gains and would stick to the current strategy of advancing slowly. (AP Photo/Evgeniy Maloletka, File)
FILE - In this photo released by the Russian Defense Ministry Press Service on Sunday, June 2, 2024, a Russian soldier operates a gun at an undisclosed location in Ukraine. Moscow’s troops are forging through Ukraine's defenses along the front line of the battlefield in a relentless onslaught this summer, prompting the West to push for new weapons and strategies to shore up Kyiv. (Russian Defense Ministry Press Service via AP, File)
FILE - A Ukrainian serviceman operates a drone on the front line in the Zaporizhzhia region of Ukraine, on Friday, June 14, 2024. Russia has taken advantage of its edge in firepower amid delays in U.S. aid to scale up attacks in several areas along the 1,000-kilometer (600-mile) front. (AP Photo/Andriy Andriyenko, File)
FILE - A Ukrainian serviceman carries a U.S. Stinger air-defense missile launcher on the front line in the Zaporizhzhia region of Ukraine, on Tuesday, May 28, 2024. Russian troops are forging through Ukraine's defenses along the front line in a relentless onslaught this summer, prompting the West to push for new weapons and strategies to shore up Kyiv. (AP Photo/Andriy Andriyenko, File)
FILE - In this photo, taken from video released by the Russian Defense Ministry Press Service on Wednesday, June 12, 2024, Russian soldiers walk through a forest in an undisclosed location in Ukraine. Russia has taken advantage of its edge in firepower amid delays in U.S. aid to scale up attacks in several areas along the 1,000-kilometer (600-mile) front. (Russian Defense Ministry Press Service via AP, File)
FILE - This photo, taken from video released by the Russian Defense Ministry Press Service on Thursday, June 27, 2024, shows a Russian combat helicopter firing rockets during a mission over Ukraine. Russian troops are forging through Ukraine's defenses along the front line of the battlefield in a relentless onslaught this summer, prompting the West to push for new weapons and strategies to shore up Kyiv. (Russian Defense Ministry Press Service via AP, File)
FILE - Russian President Vladimir Putin, left, and North Korean leader Kim Jong Un exchange documents during a ceremony for their new partnership in Pyongyang, North Korea, on Wednesday, June 19, 2024. The leaders signed a mutual defense pact, and Putin held the door open for arms supplies to the North. (Kristina Kormilitsyna, Sputnik, Kremlin Pool Photo via AP, File)
FILE - This photo, taken from video released by the Russian Defense Ministry Press Service on Wednesday, May 22, 2024, shows a Su-25 fighter jet firing rockets during a mission over Ukraine. Russian troops are forging through Ukraine's defenses along the front line of the battlefield in a relentless onslaught this summer, prompting the West to push for new weapons and strategies to shore up Kyiv. (Russian Defense Ministry Press Service via AP, File)
FILE - In this photo released by Russian Defense Ministry Press Service on Monday, May 20, 2024, Russian army's snipers change their position at an undisclosed location. Russia has taken advantage of its edge in firepower amid delays in U.S. aid to scale up attacks in several areas along the 1,000-kilometer (600-mile) front. (Russian Defense Ministry Press Service via AP, File)
FILE - Russian President Vladimir Putin, background center, and Defense Minister Andrei Belousov, background right, attend a ceremony at the Tomb of Unknown Soldier in Moscow, on Saturday, June 22, 2024. Putin says that Moscow isn't seeking quick gains in Ukraine and will stick to the current strategy of slow advances as it presses a grinding summer offensive. (Sergei Guneyev, Sputnik, Kremlin Pool Photo via AP, File)