Center on Europe and Eurasia

A self-propelled howitzer in Ukraine in November 2023. (Ukrainian Ministry of Defense, via X)

Radar domes in Svalbard, Norway, on March 15, 2013. (Bernt Rostad via Flickr)

President Joe Biden on October 11, 2023, in the White House Rose Garden. (Official White House Photo via Flicker)

Ukrainian soldiers prepare to fire a US-made M109 self-propelled howitzer on the frontline, in Donetsk, Ukraine, on February 17, 2023. (Photo by Mustafa Ciftci/Anadolu Agency via Getty Images)

A Ukrainian soldier shoots from a trophy AGS-17 on October 27, 2023, in Bakhmut, Ukraine. (Kostya Liberov/Libkos via Getty Images)

Russia's Black Sea Fleet warships take part in the Navy Day celebrations in the port city of Novorossiysk on July 30, 2023. (Stringer/AFP via Getty Images)

A Ukrainian military pilot flies a first-person view (FPV) drone during a combat flight at the front line near Bakhmut, Ukraine, on October 24, 2023. (Kostya Liberov/Libkos via Getty Images)

NATO Secretary General Jens Stoltenberg welcomed Swedish Prime Minister Magdalena Andersson to the alliance's headquarters on Monday June 27, 2022. (NATO via Flickr)

Secretary General of NATO Jens Stoltenberg during a meeting with President Volodymyr Zelenskyy on September 28, 2023, in Kyiv, Ukraine. (Vitalii Nosach/Global Images Ukraine via Getty Images)

A Ukrainian serviceman stands on a German-made Flakpanzer Gepard, a self-propelled anti-aircraft gun, after military exercises in the Odesa region on October 17, 2023. (Oleksandr Gimanov/AFP via Getty Images)