During a whirlwind weekend European tour, Zelenskyy elicited more military support from allies in preparation for a counteroffensive against Russia. After stopping in France, Italy and Germany, he was greeted warmly by U.K. Prime Minister Rishi Sunak in Checquers, U.K., May 15, 2023. Zelenskky came home with a significant aid package from Germany, worth more than $3 billion, including tanks, anti-aircraft systems and ammunition.

Following a Russian attack, first responders remove rubble at a residential building in Uman, central Ukraine, April 28, 2023.

Dead bodies in plastic bags lie on the ground near the site of a heavily damaged residential building hit by a Russian missile, amid Russia's attack on Ukraine, in the town of Uman, Cherkasy region, Ukraine, April 28, 2023.

Local resident Vladimir Kotenev, 66, sits on a chair in a room of his house heavily damaged by recent shelling in the course of Russia-Ukraine conflict in Donetsk, Russian-controlled Ukraine, April 28, 2023.

President Joe Biden participates in a wreath laying ceremony with Ukrainian President Volodymyr Zelenskyy at the memorial wall outside of St. Michael's Golden-Domed Cathedral during a surprise visit to Kyiv, Ukraine, Feb. 20, 2023. The visit signaled the ongoing support of the U.S. ahead of the war's one-year mark.

Emergency personnel rescue a woman after an apartment block was heavily damaged by a Russian missile strike, in Dnipro, Ukraine, Jan. 15, 2023. The strike on a nine-story residential building killed scores and prompted renewed calls for war crimes charges.

Ukrainian servicemen use searchlights as they search for drones in a sky over city during a Russian drones strike, in Kyiv, Ukraine, Jan. 1, 2023. Iranian-made explosive drones acquired by Russia are testing Ukraine's air defenses.

Ukrainian servicemen walk by a decorated Christmas tree in the trenches on the front line on Christmas Eve in Bakhmut, Ukraine, Dec. 24, 2022.

Vice President Kamala Harris and House Speaker Nancy Pelosi hold a Ukrainian flag autographed by front-line troops that Ukrainian President Volodymyr Zelenskyy presented to lawmakers on Capitol Hill, during his address to Congress, Dec. 21, 2022. The Ukrainian president also met with President Joe Biden during his first trip outside his country since the Russian invasion.

Residents gather outside an apartment building as critical power infrastructure burns after a Russian drone attack in Kyiv, Ukraine, Dec. 19, 2022. As winter took hold, Russia increased their attacks on civilian infrastructure, knocking out power, water and healthcare facilities.

Police officers look at collected fragments of Russian rockets that hit city, in Kharkiv, Ukraine, Dec. 3, 2022.

Men greet Ukrainian soldiers as residents gather to celebrate the liberation of Kherson, on Nov. 13, 2022. Ukrainians in the liberated southern city of Kherson expressed a sense of relief when the Russians retreated from the key city after several months of occupation.

A woman arranges flowers outside a house where a couple was killed in a Russian drone strike two days prior in Kyiv, Ukraine, Oct. 19, 2022.

Builders work to demolish the remains of a house destroyed by a Russian missile in Kharkiv, Ukraine, on Oct. 19, 2022.

A driver walks near his burned car after a Russian military strike, in central Kyiv, Ukraine, Oct. 10, 2022.

A firefighter works at a site of a residential building heavily damaged by a Russian missile strike, in Zaporizhzhia, Ukraine, Oct. 9, 2022.

Black smoke billows from a fire on the Kerch bridge that links Crimea to Russia, after a truck exploded, near Kerch, Oct. 8, 2022.

Firefighters work to extinguish a fire in Sloviansk, Donetsk region, eastern Ukraine, Aug. 29, 2022, amid a fresh Russian attempt to seize the strategic city in the fiercely fought-over Donetsk region.

Oleksandr Shulga looks at his destroyed house following a missile strike in Mykolaiv in the southern region of Ukraine, Aug. 29, 2022. Ukrainian forces have begun a counter-attack to retake the southern city of Kherson, currently occupied by Russian troops, according to a local government official.

Graves of fallen soldiers, killed during the Russian invasion, are seen in Lychakiv Cemetery in the old town of Lviv, Ukraine as the country celebrates Independence Day and marks 6 months of war on Aug. 24, 2022.

Piles of grain are seen on board the Osprey S vessel anchored in the Marmara sea during an inspection by representatives working with the joint inspection team, Aug. 18, 2022, in Istanbul, Turkey. The Osprey S left the Ukrainian port of Chornomorsk on the 16th of August carrying 11,500 tons of grain destined for Turkey. Under the terms of last month's Black Sea Grain Initiative, which paved the way for Ukraine to safely ship grain from three key ports, vessels must be inspected by a team of officials from Turkey, Ukraine, Russia and the United Nations.

An interior view of the prison building which was damaged by shelling in July in the course of Ukraine-Russia conflict, in the settlement of Olenivka in the Donetsk Region, Ukraine, Aug. 10, 2022.

A satellite image shows the destroyed Saky air base in Russian-occupied Crimea after a suspected Ukrainian attack caused explosions and fires, Aug. 10, 2022.

11-year-old boys with toy guns salute Ukrainian soldiers from their self-made checkpoint on the highway in Kharkiv region, Ukraine, July 20, 2022.

Members of the Ukrainian military raise the national flag on Snake Island, Ukraine, July 7, 2022.

Ukrainian State Emergency Service firefighters work to take away debris at a shopping center burned after a rocket attack in Kremenchuk, Ukraine, June 28, 2022.

Charred goods litter a grocery store of the destroyed Amstor mall in Kremenchuk, Ukraine, June 28, 2022, one day after it was hit by a Russian missile strike.

Ukrainian soldier Glib Stryzhko, 25, lies in a hospital bed in Zaporizhzhia, Ukraine on May 7, 2022. Gravely wounded in intense fighting in Mariupol, Stryzhko was captured in April and eventually taken to Russia before suddenly being put on a plane and sent home with others to be swapped for Russian prisoners.

Smoke rises from what appears to be a makeshift bridge across the Siverskyi Donets River, eastern Ukraine, in this handout image uploaded on May 12, 2022.

A bus carrying civilians evacuated from Azovstal steel plant in Mariupol arrives at a temporary accommodation center in the village of Bezimenne, Donetsk Region, Ukraine on May 6, 2022.

A Ukrainian refugee from the Azovstal steel plant in Mariupol arrives at a registration and humanitarian aid centre for internally displaced people in Zaporizhzhia, Ukraine, May 8, 2022.

U2 rock band frontman Bono sings during a performance for people sheltering inside a subway station in Kyiv, Ukraine May 8, 2022.

A nurse checks the wounds of Ponomareva Natalia Sergiivna, 51, three days after her family's home was shelled by Russian forces in their frontline village of Vysokopilla in the Kherson region of southern Ukraine on May 05, 2022 in Kryvyi Rih, Ukraine.

In this drone image, a grave digger prepares the ground for a funeral at a cemetery in Irpin, Ukraine, on April 20, 2022. The first several rows contain people killed during the Russian occupation of the area.

A man pets a dog next to a house damaged by a military strike during Russia's invasion in the village of Kukhari in the Kyiv region of Ukraine, April 16, 2022.

Destroyed houses are seen in Irpin, Ukraine on April 18, 2022.

Yana Bachek is consoled by her partner Yevgeniy Vlasenko and her mother Lyubov Gubareva, as she mourns over the body of her father Victor Gubarev, 79, in Kharkiv, Ukraine, April 18, 2022.

Ukrainian servicemen run for cover as explosions are heard during a Russian attack in downtown Kharkiv, Ukraine, on April 17, 2022.

Images from a video released on April 18, 2022, by the far-right Azov Battalion fighting with Ukrainians, show what appears to be civilians - including women and children - in the Azovstal steel plant in Mariupol, Ukraine. ABC News has been unable to verify the authenticity of the images and Russia denies civilians remain there.

Servicemen of the Donetsk People's Republic militia look at bodies of Ukrainian soldiers placed in plastic bags in a tunnel, part of the Illich Iron & Steel Works Metallurgical Plant, the second largest metallurgical enterprise in Ukraine, in an area controlled by Russian-backed separatist forces in Mariupol, Ukraine, April 18, 2022.

A woman is taken to an ambulance after being injured in a Russian bombardment in Kharkiv, Ukraine, April 17, 2022.

Smoke rises above 400 new graves in the town of Severodonetsk, Ukraine, on April 15, 2022.

Road workers load a destroyed Russian tank onto a platform in the village of Andriyivka close to Kyiv, Ukraine, April 11, 2022.

A Ukrainian multiple rocket launcher BM-21 "Grad" shells Russian troops' position, near Lugansk, in the Donbas region, Ukraine, April 10, 2022.

A photo published on Ukrainian President Volodymyr Zelenskyy's Telegram channel, shows blood stains among luggage and a baby carriage at the railway station in Kramatorsk, Ukraine, April 8, 2022, following the attack that left scored dead.

Police inspect the remains of a large rocket with the words "for our children" in Russian next to the main building of a train station, being used for civilian evacuations, in Kramatorsk, Ukraine, which was hit by a rocket attack killing many people on April 8, 2022.

Burnt cars lie outside a train station in Kramatorsk, eastern Ukraine, where civilians had gathered to evacuate, after it was hit by a rocket, killing scores, April 8, 2022.

Soldiers walk amid destroyed Russian tanks in Bucha, on the outskirts of Kyiv, Ukraine, April 3, 2022. Ukrainian troops are finding brutalized bodies and widespread destruction in the suburbs of Kyiv, sparking new calls for a war crimes investigation and sanctions against Russia.

People react as they gather close to a mass grave in town of Bucha, just northwest of the Ukrainian capital Kyiv, April 3, 2022.

Bodies lie in the street in Bucha, northwest of Kyiv, in Ukraine on April 2, 2022 after Russian forces withdrew from the town.

A dead person with hands bound by white cloth, who according to residents was shot by Russian soldiers, lies in the street in Bucha, Ukraine on April 3, 2022.

A member of the Ukrainian special forces is silhouetted as a gas station burns after Russian attacks in the city of Kharkiv on March 30, 2022.

A wounded Ukrainian soldier is assisted as he arrives at the military hospital in Zaporizhzhya, Ukraine on March 31, 2022.

A soldier fighting for Ukraine watches for movement outside during a clearing-out operation of remaining Russian forces in Irpin, Ukraine, on March 29, 2022. The Ukrainian unit has essentially retaken, for now, the suburb just west of Kyiv that has been the scene of fierce fighting in recent weeks.

A Ukrainian soldier carries Russian weapons captured during a battle between Ukrainian and Russian forces outside Kharkiv, Ukraine, March 29, 2022.

The regional government headquarters of Mykolaiv, Ukraine, following a Russian attack, March 29, 2022. Ukrainian President Volodymyr Zelenskyy says seven people were killed in a missile strike on the regional government headquarters in the southern city of Mykolayiv.

An armored convoy of pro-Russia troops drive down a road leading to the besieged southern port city of Mariupol, Ukraine, on March 28, 2022.

A man recovers items from a burning shop following a Russian attack in Kharkiv, Ukraine, March 25, 2022.

Yana Ostashko, 37, comforts her daughter Veronika Ostashko, 16, as they remain underground for more than a month while Russian bombardment continues in their city of Kharkiv, March 26, 2022. More than a dozen people are crammed in the hallways, locker rooms, equipment rooms and storage areas at an underground metro subway station in the city.

Family members of Borys Romanchenko attend the funeral for the Holocaust survivor in Kharkiv, Ukraine, March 24, 2022. Romanchenko was a 96-year-old Holocaust survivor who was killed in his apartment during a shelling.

A Ukrainian serviceman guards a military check point in the city of Zhytomyr, northern Ukraine, March 23, 2022.

Children play in front of a building damaged during the Russian invasion of Ukraine, in the besieged southern port of Mariupol, Ukraine, March 23, 2022.

People gather amid the destruction caused after shelling of a shopping center, in Kyiv, Ukraine, on March 21, 2022.

Military emergency service members remove the body of a dead Ukrainian serviceman in the area of a research institute, part of Ukraine's National Academy of Science, after a strike, in northwestern Kyiv, Ukraine, March 22, 2022.

Crosses are pictured under smoke from garbage in the cemetery in Mykolaiv, southern Ukraine, on March 21, 2022.

People examine the damage after shelling of a shopping center, in Kyiv, Ukraine, March 21, 2022.

People dig a grave for victims killed during Ukraine-Russia conflict in the besieged southern port city of Mariupol, Ukraine March 20, 2022.

Ukrainian soldiers and rescue officers search for bodies in the debris at the military school hit by Russian rockets the day before, in Mykolaiv, southern Ukraine, March 19, 2022.

Rescuers carry a Ukrainian soldier saved after 30 hours from debris of the military school hit by Russian rockets, in Mykolaiv, southern Ukraine, March 19, 2022.

Evacuees sit in their cars as they try to leave the besieged port city of Mariupol, Ukraine, March 17, 2022.

A young boy, Vova, sits in a wheel chair in the corridor of a hospital in Kyiv, Ukraine, March 17, 2022. Vova was escaping from Nikolayev to Kyiv with three other children and three adults when their car was attacked by armed man. His father and and another child were killed.

Smoke rises from the Donetsk Regional Theatre of Drama destroyed by an airstrike, in Mariupol, Ukraine, March 16, 2022. Satellite photos showed the word "children" in Russian written in large white letters on the pavement in front of and behind the building to mark the building as a shelter with children.

Volodymyr Zelenskiy, Ukraine's president, addressing members of Congress virtually at the Capitol, March 16, 2022.

Tracers are seen in the night sky as Ukrainian servicemen fire on a drone as Russia's attack on Ukraine continues, in Kyiv, Ukraine, March 14, 2022.

A woman is evacuated from a burning apartment building in Kyiv on March 15, 2022, after strikes on residential areas killed at least two people, according to Ukraine emergency services, as Russian troops intensified their attacks on the Ukrainian capital.

Colonel Oleh Yaschyshyn's mother rests her head on his coffin during a memorial service for Yaschyshyn and fellow soldiers, Sergiy Melnyk, Rostyslav Romanchuk and Kyrylo Vyshyvany, killed during Russia's invasion, in Lviv, Ukraine, March 15, 2022.

Ukraine's President Volodymyr Zelenskyy visits an injured Ukrainian serviceman at a military hospital, as Russia's attack on Ukraine continues, in Kyiv, Ukraine March 13, 2022.

A Ukrainian soldier walks past a self made memorial to late soldier-mates in Svetlodarsk outside Donetsk, March 12, 2022.

Firefighters evacuate an elderly woman from an apartment building hit by shelling in Kyiv, Ukraine, March 14, 2022.

Anastasia Erashova cries as she hugs the one remaining living child of her three children in a corridor of a hospital in Mariupol, eastern Ukraine, March 11, 2022. Anastasia's other two children were killed during the shelling of Mariupol.

An explosion is seen in an apartment building after a Russian tank fires in Mariupol, Ukraine, March 11, 2022.

Russian tanks move on the outskirts of Mariupol, Ukraine, March 11, 2022.

People carry white flags as they walk through the city of Irpin, Ukraine, March 11, 2022.

People attend the memorial and funeral service for three Ukrainian soldiers (Taras Didukh, Dmytro Kabakov and Andrea Stefanyshyn) in Lviv, Ukraine, March 11, 2022.

Volentini, a volunteer at an elderly hospice, cries as she talks with 88 year-old resident Galina before she is evacuated, March 10, 2022, from Irpin, Ukraine. Irpin, a suburb northwest of Kyiv, has experienced days of sustained shelling by Russian forces advancing toward the capital.

A Ukrainian soldier hides from a helicopter airstrike near Demydiv, Ukraine March 10, 2022.

Ukrainian servicemen search the damaged maternity hospital in Mariupol, Ukraine, March 9, 2022.

Ukrainian emergency employees and volunteers carry an injured pregnant woman from a severely damaged maternity hospital in Mariupol, Ukraine, March 9, 2022, after a Russian attack. The woman was rushed to another hospital, but doctors were unable to save the lives of the child and her mother.

Dead bodies are placed into a mass grave on the outskirts of Mariupol, Ukraine, March 9, 2022, as people cannot bury the dead because of the heavy shelling by Russian forces.

Olga hugs her boyfriend Vlodomyr as they say goodbye prior to Vlodomyr's deployment during Russia's invasion of Ukraine, at the train station in Lviv, Ukraine, March 9, 2022.

A Ukrainian serviceman walks past the vertical tail fin of a Russian Su-34 bomber lying in a damaged building in Kharkiv, Ukraine, March 8, 2022.

Hanna Bespalko, 54, faints during the burial of her son Denys Hrynchuk, at the cemetery in Bila Krynytsia, March 6, 2022, in Chernivtsi region, Ukraine. Denys Hrynchuk served in the Ukrainian army and was killed on February 28, 2022. He is survived by his mother, five brothers and a sister, his wife and his one-year-old son.

Ukrainian soldiers carry the body of fellow soldier Denys Hrynchuk from the family home to the church in Bila Krynytsia, on March 6, 2022 in Chernivtsi region, Ukraine. Hrynchuk was killed on Feb. 28, 2022, near Volnovakha, Donetsk region.

The body of a civilian who was killed while attempting to flee, lies covered next to a suitcase, March 6, 2022, in Irpin, near from Kyiv, Ukraine.

Former Ukrainian President Petro Poroshenko surrounded by Ukrainian soldiers arrives at a defense position on the outskirts of Kyiv, Ukraine, March 5, 2022.

Ukrainians crowd under a destroyed bridge as they try to flee crossing the Irpin river in the outskirts of Kyiv, Ukraine, March 5, 2022.

A Ukrainian soldier carries a baby helping a fleeing family to cross the Irpin river in the outskirts of Kyiv, Ukraine, March 5, 2022.

An aerial view shows a residential building destroyed by shelling, as Russia's invasion of Ukraine continues, in the settlement of Borodyanka in the Kyiv region, Ukraine, March 3, 2022.

Oleg, right, who decided to remain in Irpin, passes his son Maksim over a fence to his wife Yana, before the arrival of an evacuation train at the station in Irpin, Ukraine, March 4, 2022.

Serhii, father of teenager Iliya, cries over his son's lifeless body lying on a stretcher at a maternity hospital converted into a medical ward in Mariupol, Ukraine, March 2, 2022.

Local militiamen help an old woman crossing a bridge destroyed by artillery, as she tries to flee, on the outskirts of Kyiv, Ukraine, March 2. 2022.

A woman holds her child as she tries to board into a free train to Poland at a train station in Lviv, western Ukraine, March 3, 2022.

Police officers remove the body of a passerby killed in an airstrike the previous day that hit Kyiv's main television tower in Kyiv, March 2, 2022.

Pregnant women sit in the basement of a maternity hospital converted into a medical ward and used as a bomb shelter during air raid alerts, in Kyiv, Ukraine, March 2, 2022.

People look at the gutted remains of Russian military vehicles on a road in the town of Bucha, close to the capital Kyiv, Ukraine, March 1, 2022.

A blast is seen at a TV tower, amid Russia's invasion of Ukraine, in Kyiv, Ukraine, March 1, 2022.

Local residents prepare Molotov cocktails to defend the city, after Russia launched a massive military operation against Ukraine, in Uzhhorod, Ukraine Feb. 27, 2022.

Ukrainian troops escort a man they suspect is a Russian agent in Kyiv, Ukraine, Sunday, Feb. 27, 2022. Ukrainian authorities say that Russian troops have entered Ukraine's second-largest city of Kharkiv and fighting is underway in the streets.

People take cover as an air-raid siren sounds near an apartment building damaged by recent shelling in Kyiv, Ukraine, Feb. 26, 2022.

A residential building is seen damaged after a it was hit by a rocket in Kyiv, Ukraine, Feb. 26, 2022.

Ukrainian tanks move on a road before an attack in Lugansk region in eastern Ukraine, Feb. 26, 2022.

Ukrainian military volunteers receive weapons at a weapons storage facility in Fastiv, Ukraine, Feb. 25, 2022.

Ukrainian servicemen walk by a damaged vehicle at the site of a fighting with Russian troops, after Russia launched a massive military operation against Ukraine, in Kyiv, Ukraine, Feb. 26, 2022.

A building after it was reportedly struck by a Russian rocket in Kyiv, Ukraine, Feb. 26, 2022.

Ukrainian refugees cry as they reunite at the Medyka border crossing, Poland, Feb. 26, 2022.

The body of a Russian soldier lies near destroyed Russian vehicles the day after fighting with Ukrainian soldiers on a highway outside Kharkiv, Ukraine, Feb. 25, 2022.

People look at a damaged building following a rocket attack in Kyiv, Ukraine, Feb. 25, 2022. Russian President Vladimir Putin announced a military operation in Ukraine on Thursday, Feb. 23. Explosions were heard soon after across the country and its foreign minister warned a "full-scale invasion" was underway.

Ukrainian national guardsmen take positions in central Kyiv, Friday, Feb. 25, 2022.

Volunteers, one holding an AK-47 rifle, protect a main road leading into Kyiv, Ukraine on Feb. 25, 2022.

Hundreds of people seek shelter underground, on the platform, inside dark train cars, and even in the emergency exits, in a metro subway station as the Russian invasion of Ukraine continues, in Kharkiv, Ukraine, Feb. 24, 2022.

People enter Romania, after having crossed from Ukraine, Feb. 24, 2022, in Sighetu Marmatiei, Romania.

A wounded woman is seen after an airstrike damaged an apartment complex outside of Kharkiv, Ukraine on Feb. 24, 2022.

A woman reacts as she waits for a train to leave Kyiv, Ukraine, Feb. 24, 2022.

A Ukrainian soldier keeps watch on the front line with Russia-backed separatists near the town of Schastia, near the eastern Ukraine city of Lugansk on Feb. 23, 2022.