Center on Europe and Eurasia

Joe Biden on April 14, 2023. (Leon Neal/Getty Images)

Ukrainian artillery recruits come to the end of their training on AS90 155mm self-propelled gun on March 24, 2023, in England. (Finnbarr Webster via Getty Images)

Supporters of Ukraine hold a rally to mark the one-year anniversary of Russia's invasion of Ukraine near the Lincoln Memorial on the National Mall on February 25, 2023, in Washington, DC. (Drew Angerer via Getty Images)

(Screenshot via CBS)

Russian Navyâs lone aircraft carrier is towed to the shipyard for maintenance in Murmansk, Russia, on May 20, 2022. (Semen Vasileyev/Anadolu Agency via Getty Images)

People looking at drones on display in an exhibition in the PMC Wagner Centre during the official opening of the office block on the National Unity Day in Saint Petersburg, on November 4, 2022. (Olga Maltseva/AFP via Getty Images)

Afghanistans Foreign Minister Amir Khan Muttaqi at his office in the foreign ministry in Kabul on February 2, 2022. (Wakil Kohsar/AFP via Getty Images)

Frank-Walter Steinmeier, Andrzej Duda, and Isaac Herzog at the central commemoration on the eightieth anniversary of the Warsaw Ghetto Uprising on April 19, 2023, in Warsaw, Poland. (Sandra Steins/Bundesregierung via Getty Images)

A Ukrainian tank fires during practice on the frontline of the Russia-Ukraine War in Donetsk, Ukraine, on March 29, 2023. (Muhammed Enes Yildirim/Anadolu Agency via Getty Images)

Ukrainian soldier is seen in a trench1 km away from Russian positions near Soledar. (Ashley Chan/SOPA Images/LightRocket via Getty Images)

Russian Navy's diesel-electric Kilo class submarine Rostov-on-Don sails through the Bosphorus Strait on February 13, 2022. (Photo by Ozan Kose/AFP via Getty Images)

US Army National Guard Soldiers with Battery C conduct pre-mobilization training exercise America’s Shield on May 15, 2022, at McEntire Joint National Guard Base, South Carolina. (Tim Andrews via DVIDS)