President Joe Biden and first lady Jill Biden walk across the South Lawn of the White House in Washington, Tuesday, Aug. 13, 2024, after returning from a trip to New Orleans to tout the Biden Cancer Moonshot initiative, which aims to boost funding, research and treatment to prevent cancer deaths and help those living with the disease. (AP Photo/Susan Walsh)

A plate with sign "Kursk 108 km" is seen on the Russian-Ukrainian border in Sumy region, Ukraine, Tuesday, Aug. 13, 2024. (AP Photo/Evgeniy Maloletka)

Military vehicles drive near the Russian-Ukrainian border in Sumy region, Ukraine, Tuesday, Aug. 13, 2024. (AP Photo/Evgeniy Maloletka)

An anti-tank system known as "dragon teeth" covers a field on the Russian-Ukrainian border in the Sumy region of Ukraine, Tuesday, Aug. 13, 2024. (AP Photo/Evgeniy Maloletka)