Center on Europe and Eurasia

Flags for the United States and Ukraine fly on April 23, 2024, in Washington, DC. (Anna Moneymaker via Getty Images)

Ukrainian soldiers on an M2 Bradley infantry fighting vehicle on February 23, 2024, in Donetsk Oblast, Ukraine. (Vitalii Nosach/Global Images Ukraine via Getty Images)

Ukrainian soldiers await orders to fire from a 2S1 on September 26, 2024, in Chasiv Yar, Ukraine. (Pierre Crom via Getty Images)

Russian President Vladimir Putin gestures during his speech on September 7, 2024, in Moscow, Russia. (Getty Images)

A Stryker fighting vehicle drives down the street on August 30, 2024, in Kursk Region, Russia. (Oleg Palchyk/Global Images Ukraine via Getty Images)

A memorial is set near the site of an attack that killed three people in Solingen, Germany, on August 26, 2024. (Ying Tang/NurPhoto via Getty Images)

(Screenshot via YouTube)

Ukrainian soldier hides behind a tree on August 16, 2024, in Sudzha, Russia. (Taras Ibragimov/Suspilne Ukraine via Getty Images)

(Screenshot via YouTube)

Ukrainian soldiers are seen near the Russian store "Magnit" on August 16, 2024, in Sudzha, Russia. (Kostiantyn Liberov/Libkos via Getty Images)

Ukrainian servicemen operate a Soviet-made T-72 tank in the Sumy region on August 12, 2024. (Roman Pilipey/AFP via Getty Images)

Russian Sukhoi Su-35S fighter aircrafts fly over downtown Moscow on June 24, 2020. (Kirill Kudryavtsev via Getty Images)