Center on Europe and Eurasia

An SU-27 of the Ukrainian Air Force on final approach at Kleine Brogel Military Air Base in Belgium on September 13, 2019. (Nicolas Economou via Getty Images)

A man suspected of taking part in the attack of a concert hall that killed 137 people is escorted by Russian law enforcement officers at the Basmanny District Court in Moscow on March 24, 2024. (Photo by Olga Maltseva/AFP via Getty Images)

A Ukrainian mortar team near Toretsk, Ukraine, on March 26, 2024. (Wolfgang Schwan via Getty Images)

Texas national guardsmen arrive at the El Paso airport on March 26, 2024 in El Paso, Texas. (Photo by Brandon Bell/Getty Images)

Russian President Vladimir Putin, accompanied by Defence Minister Sergei Shoigu and Commander-in-Chief of the Russian Navy, Admiral Nikolai Yevmenov, attending the Navy Day parade in Saint Petersburg on July 30, 2023. (Alexander Kazakov via Getty Images)

A Swedish CB90-class fast assault craft approaches the well deck of the Whidbey Island-class dock landing ship USS Gunston Hall during exercise Steadfast Defender 24 on March 6, 2024, in the Norwegian Sea. (US Navy photo by Mass Communication Specialist 1st Class Danielle Serocki)

Ukrainian soldiers of the 79th brigade in the frontline city of Vuhledar, Ukraine, on March 12, 2024. (Photo by Wolfgang Schwan/Anadolu via Getty Images)

Ukrainian soldiers receive training at an undisclosed location in Donetsk Oblast, Ukraine, on March 6, 2024. (Photo by Jose Colon/Anadolu via Getty Images)

Ukrainian soldier demonstrates firing the MBT-NLAW provided by the United Kingdom. (Alex Chan Tsz Yuk via Getty Images)

A Ukrainian soldier looks at the sky after hearing the sound of a nearby drone at the Bakhmut front line in Donetsk Oblast, Ukraine, on January 13, 2024. (Photo by Ignacio Marin/Anadolu via Getty Images)

Russian President Vladimir Putin listens to Defence Minister Sergei Shoigu on February 23, 2024, in Moscow, Russia. (Photo by Contributor/Getty Images)