Center on Europe and Eurasia

The expedition cruise ship Polar Pioneer at Gnålodden in the Hornsund in Svalbard, Norway, on July 15, 2015. (Wolfgang Kaehler via Getty Images)

Russian President Vladimir Putin and China's President Xi Jinping toast during a reception at the Kremlin, Moscow, on March 21, 2023. (Pavel Byrkin/SPUTNIK/AFP via Getty Images)

(Screenshot via TVP World)

Nakhimov Square in Sevastopol, Crimea on March 19, 2023. (Vladimir Aleksandrov via Getty Images)

Ukrainian servicemen fire a D-30 howitzer at Russian positions near Bakhmut, Ukraine, on March 21, 2023. (Sergey Shestak/AFP via Getty Images)

An MQ- Reaper remotely piloted aircraft performs aerial maneuvers over Creech Air Force Base, Nevada, on June 25, 2015. (Christian Clausen via DVIDS)

Russian President Vladimir Putin and Iran's President Ebrahim Raisi hold a meeting in Tehran on July 19, 2022. (Sergei Savostyanov/Sputnik/AFP via Getty Images)

A Ukrainian serviceman flies a drone to spot Russian positions near Bakhmut, Ukraine, on March 5, 2023. (Aris Messinis/AFP via Getty Images)

(Screenshot via YouTube)

(Screenshot via ABC News)

Ukrainian servicemen fire a Caesar self-propelled howitzer toward Russian positions at a front line in Donbas, Ukraine, on June 15, 2022. (Aris Messinis/AFP via Getty Images)

(Wikimedia Commons)