People wait in a traffic jam as they leave the city of Kharkiv, after Russian President Vladimir Putin authorised a military operation in eastern Ukraine, in Kharkiv region, Ukraine February 24, 2022. REUTERS/Antonio Bronic 

Servicemen of the Ukrainian National Guard take positions in central Kyiv, after Russia launched a massive military operation against Ukraine, February 25, 2022. REUTERS/Gleb Garanich TPX IMAGES OF THE DAY 

Smoke and flames rise over during the shelling near Kyiv, as Russia continues its invasion of Ukraine February 26, 2022. REUTERS/Gleb Garanich TPX IMAGES OF THE DAY 

People take cover as an air-raid siren sounds, near an apartment building damaged by recent shelling in Kyiv, Ukraine February 26, 2022. REUTERS/Gleb Garanich TPX IMAGES OF THE DAY 

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 February 26, 2022. REUTERS/Valentyn Ogirenko TPX IMAGES OF THE DAY 

An armed local resident carries a cat in a carrier and a fish in an aquarium, which he took out of an apartment building damaged by recent shelling in Kyiv, Ukraine February 26, 2022. REUTERS/Mikhail Palinchak TPX IMAGES OF THE DAY 

Local residents prepare Molotov cocktails to defend the city, after Russia launched a massive military operation against Ukraine, in Uzhhorod, Ukraine February 27, 2022. REUTERS/Serhii Hudak TPX IMAGES OF THE DAY 

A woman fleeing Russian invasion of Ukraine hugs a child at a temporary camp in Przemysl, Poland, February 28, 2022. REUTERS/Yara Nardi TPX IMAGES OF THE DAY 

A refugee child fleeing from Ukraine gestures when waiting for transport at Nyugati station, after Russia launched a massive military operation against Ukraine, in Budapest, Hungary, February 28, 2022. REUTERS/Marton Monus TPX IMAGES OF THE DAY 

Ukrainian President Volodymyr Zelenskiy poses after an interview with Reuters in Kyiv, Ukraine, March 1, 2022. REUTERS/Umit Bektas TPX IMAGES OF THE DAY 

A civilian trains to throw Molotov cocktails to defend the city, as Russia's invasion of Ukraine continues, in Zhytomyr, Ukraine March 1, 2022. REUTERS/Viacheslav Ratynskyi TPX IMAGES OF THE DAY 

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. Picture taken with a drone. REUTERS/Maksim Levin TPX IMAGES OF THE DAY 

Children look out from an evacuation train from Kyiv to Lviv as they say goodbye to their father at Kyiv central train station in central Kyiv, Ukraine March 3, 2022. REUTERS/Gleb Garanich TPX IMAGES OF THE DAY 

A Ukrainian service member walks near a school building destroyed by shelling, as Russia's invasion of Ukraine continues, in Zhytomyr, Ukraine March 4, 2022. REUTERS/Viacheslav Ratynskyi TPX IMAGES OF THE DAY 

Local residents escape from the town of Irpin, after heavy shelling landed on the only escape route used by locals, as Russian troops advance towards the capital of Kyiv, in Irpin, near Kyiv, Ukraine March 6, 2022. REUTERS/Carlos Barria TPX IMAGES OF THE DAY 

Local residents look for cover as they escape from the town of Irpin, after heavy shelling on the only escape route used by locals, while Russian troops advance towards the capital of Kyiv, in Irpin, near Kyiv, Ukraine March 6, 2022. REUTERS/Carlos Barria TPX IMAGES OF THE DAY 

A member of the Honour Guard holds a portrait of the member of the Ukrainian Armed Forces, Valerii, who was killed during Russia's invasion of Ukraine, during a funeral ceremony in Kyiv, Ukraine, March 8, 2022. REUTERS/Valentyn Ogirenko TPX IMAGES OF THE DAY 

A police officer says goodbye to his son as his family flees from advancing Russian troops as Russia's attack on Ukraine continues in the town of Irpin outside Kyiv, Ukraine, March 8, 2022. REUTERS/Thomas Peter TPX IMAGES OF THE DAY 

Oleksey Beregoviy, a musician of the Kyiv-Classic Symphony Orchestra, performs for journalists and people after an open-air concert named "Free Sky" at the Independence Square in central Kyiv, Ukraine March 9, 2022. REUTERS/Gleb Garanich TPX IMAGES OF THE DAY 

Olga hugs her boyfriend Vlodomyr as they say good bye prior to Vlodomyr’s deployment closer to the front line, amid Russia's invasion of Ukraine, at the train station in Lviv, Ukraine, March 9, 2022. REUTERS/Kai Pfaffenbach TPX IMAGES OF THE DAY 

A Ukrainian soldier hides from a helicopter airstrike amid Russia's invasion of Ukraine, near Demydiv, Ukraine March 10, 2022. REUTERS/Maksim Levin TPX IMAGES OF THE DAY 

Ukrainian soldiers walk past a monument of the city founder Duke de Richelieu, covered with sand bags for protection, amid Russia's invasion of Ukraine, in Odessa, Ukraine, March 10, 2022. REUTERS/Alexandros Avramidis TPX IMAGES OF THE DAY 

Ukrainian servicemen carry a dead body on stretcher as Russia's invasion of Ukraine continues, in the town of Irpin outside Kyiv, Ukraine, March 12, 2022. REUTERS/Marko Djurica TPX IMAGES OF THE DAY 

A fragment of a missile is seen in the street after shelling in the separatist-controlled city of Donetsk, Ukraine March 14, 2022. REUTERS/Stringer TPX IMAGES OF THE DAY 

Tracers are seen in the night sky as Ukrainian servicemen fire on the drone as Russia's attack on Ukraine continues, in Kyiv, Ukraine March 14, 2022. REUTERS/Gleb Garanich TPX IMAGES OF THE DAY 

A woman walks with a bicycle next to a building damaged during Ukraine-Russia conflict in the separatist-controlled town of Volnovakha in the Donetsk region, Ukraine March 15, 2022. REUTERS/Alexander Ermochenko TPX IMAGES OF THE DAY 

Tetiana Chornovol, former member of the Ukrainian Parliament, now a service member and operator of an anti-tank guided missile weapon system, pulls an anti-tank missile out of a car at a position on the front line, amid Russia's invasion of Ukraine, in the Kyiv region, Ukraine March 20, 2022. REUTERS/Gleb Garanich TPX IMAGES OF THE DAY 

Local residents walk near residential buildings which were damaged during Ukraine-Russia conflict in the besieged southern port city of Mariupol, Ukraine March 18, 2022. REUTERS/Stringer TPX IMAGES OF THE DAY 

Egor, 5, comforts his mother Helen Yakubets who cries in a ballroom, which has been converted to a temporary shelter, at the Mandachi hotel after fleeing from Chernihiv in Ukraine to Romania, following Russia's invasion of Ukraine, at the border crossing in Suceava, Romania, March 20, 2022. Her 18 year old son and husband remain in Ukraine to fight. REUTERS/Clodagh Kilcoyne TPX IMAGES OF THE DAY 

Firefighters work at the site of a bombing at a shopping center as Russia's invasion of Ukraine continues, in Kyiv, Ukraine March 21, 2022. REUTERS/Marko Djurica TPX IMAGES OF THE DAY 

Olena, the mother of Denys Snihur, 25, a border guard-turned-soldier, killed by Russian shelling in the northern town of Ovruch, mourns her son during his funeral at the Lychakiv cemetery, in Lviv, Ukraine, March 21, 2022. REUTERS/Zohra Bensemra TPX IMAGES OF THE DAY 

Members of the Ukrainian Territorial Defense Forces check a man as they patrol during a long curfew in Kyiv, Ukraine March 22, 2022. REUTERS/Gleb Garanich TPX IMAGES OF THE DAY 

A firefighter works at a residential district that was damaged by shelling, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine March 23, 2022. REUTERS/Marko Djurica TPX IMAGES OF THE DAY 

Family members of Borys Romanchenko attend the funeral of the Holocaust survivor in Kharkiv as Russia's attack on Ukraine continues, Ukraine, March 24, 2022. Romanchenko was a 96-year-old Holocaust survivor, who was killed at his apartment during a shelling. REUTERS/Thomas Peter TPX IMAGES OF THE DAY 

Local residents sit on a bench near an apartment building destroyed in the course of Ukraine-Russia conflict in the besieged southern port city of Mariupol, Ukraine March 25, 2022. REUTERS/Alexander Ermochenko TPX IMAGES OF THE DAY 

A man walks past a fire after a shelling, as Russia's attack on Ukraine continues, in Kharkiv, Ukraine March 25, 2022. REUTERS/Oleg Pereverzev TPX IMAGES OF THE DAY 

People watch as smoke rises after an airstrike, as Russia's attack on Ukraine continues, in Lviv, Ukraine March 26, 2022. REUTERS/Pavlo Palamarchuk TPX IMAGES OF THE DAY 

Curtains flutter in the wind at a building that was damaged by shelling in a neighbourhood that has been largely abandoned and left without water, gas and heating, as Russia's attack on Ukraine continues, in Kharkiv, Ukraine, March 28, 2022. REUTERS/Thomas Peter TPX IMAGES OF THE DAY 

A Ukrainian serviceman hugs his mother Larysa Kolesnyk, 82, after she was evacuated from Irpin town, as Russia's attack on Ukraine continues, on the outskirts of Kyiv, Ukraine March 30, 2022. REUTERS/Zohra Bensemra TPX IMAGES OF THE DAY 

Ukrainian servicemen pose for a picture near a destroyed bridge as Russia's invasion of Ukraine continues, in the town of Irpin outside Kyiv April 1, 2022. REUTERS/Gleb Garanich TPX IMAGES OF THE DAY 

Local residents ride bicycles past flattened civilian cars, as Russia's attack on Ukraine continues, on a street in the town of Bucha, in Kyiv region, Ukraine April 1, 2022. REUTERS/Oleksandr Ratushniak TPX IMAGES OF THE DAY 

A soldier takes a photograph of his comrade as he poses beside a destroyed Russian tank and armoured vehicles, amid Russia's invasion on Ukraine in Bucha, in Kyiv region, Ukraine April 2, 2022. REUTERS/Zohra Bensemra TPX IMAGES OF THE DAY 

An Orthodox Church is seen in front an oil refinery which caught fire following a missile attack near the port city of Odesa, amid the ongoing Russia's invasion, in Ukraine, April 3, 2022. REUTERS/Nacho Doce TPX IMAGES OF THE DAY 

A Ukrainian service member walks in a front of the Antonov An-225 Mriya cargo plane, the world's biggest aircraft, destroyed by Russian troops as Russia's attack on Ukraine continues, at an airfield in the settlement of Hostomel, in Kyiv region, Ukraine April 3, 2022. REUTERS/Gleb Garanich TPX IMAGES OF THE DAY 

A view shows buildings damaged in the course of Ukraine-Russia conflict in the southern port city of Mariupol, Ukraine April 3, 2022. REUTERS/Stringer TPX IMAGES OF THE DAY 

Marat and Renat Bonderenko stand in the living room of their neighbours' house, which was hit by a projectile during an aerial bombardment, in the village of Yakovlivka outside Kharkiv, as Russia's attack on Ukraine continues, April 3, 2022. "War is when bad people shoot, when they blow everything up and kill good people and good soldiers make sure that we can sleep at night," Marat said. REUTERS/Thomas Peter SEARCH "YAKOVLIVKA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY 

Local residents walk along a street next to a building damaged during Ukraine-Russia conflict in the southern port city of Mariupol, Ukraine April 3, 2022. The sign on the vehicle reads: "Children". REUTERS/Alexander Ermochenko TPX IMAGES OF THE DAY 

Local resident Viktoria Mukhina, 33, plants tulips with her daughter Miroslava near an apartment building damaged during Ukraine-Russia conflict in the southern port city of Mariupol, Ukraine April 4, 2022. REUTERS/Alexander Ermochenko TPX IMAGES OF THE DAY 

A woman carries her cat as she walks past buildings that were destroyed by Russian shelling, amid Russia's invasion of Ukraine in Borodyanka, in the Kyiv region, Ukraine, April 5, 2022. REUTERS/Zohra Bensemra TPX IMAGES OF THE DAY 

A couple hugs while walking past a building that was heavily damaged by shelling, as Russia's attack on Ukraine continues, in Kharkiv, Ukraine, April 10, 2022. REUTERS/Alkis Konstantinidis TPX IMAGES OF THE DAY 

Graves of civilians killed during Ukraine-Russia conflict are seen next to apartment buildings in the southern port city of Mariupol, Ukraine April 10, 2022. REUTERS/Alexander Ermochenko TPX IMAGES OF THE DAY 

A young man eats inside a subway car, as residents find shelter from shelling in a metro station, amid Russia's attack on Ukraine, in Kharkiv, Ukraine, April 11, 2022. REUTERS/Alkis Konstantinidis TPX IMAGES OF THE DAY 

An armoured vehicle of pro-Russian troops is seen in the street during Ukraine-Russia conflict in the southern port city of Mariupol, Ukraine April 11, 2022. REUTERS/Chingis Kondarov 

A woman reacts as she hugs another woman outside a heavily damaged apartment block, following an artillery attack, amid Russia's attack on Ukraine, in Kharkiv, Ukraine, April 13, 2022. REUTERS/Alkis Konstantinidis TPX IMAGES OF THE DAY 

A view shows a torn flag of Ukraine hung on a wire in front an apartment building destroyed during Ukraine-Russia conflict in the southern port city of Mariupol, Ukraine April 14, 2022. REUTERS/Alexander Ermochenko TPX IMAGES OF THE DAY 

A local resident Mykola, 70, climbs down with a stepladder from a bridge destroyed during Russia's invasion in the village of Kukhari in Kyiv region, Ukraine April 19, 2022. REUTERS/Vladyslav Musiienko TPX IMAGES OF THE DAY 

Service members of pro-Russian troops, including fighters of the Chechen special forces unit, stand in front of the destroyed administration building of Azovstal Iron and Steel Works during Ukraine-Russia conflict in the southern port city of Mariupol, Ukraine April 21, 2022. REUTERS/Chingis Kondarov TPX IMAGES OF THE DAY 

Military chaplains Maksym and Oleksandr conduct an Orthodox Easter service for Ukrainian servicemen at their position, as Russia's attack on Ukraine continues, in Kharkiv region, Ukraine April 24, 2022. REUTERS/Serhii Nuzhnenko TPX IMAGES OF THE DAY 

A woman reacts as she says goodbye to her serviceman husband before he leaves to the frontline, amid Russia's invasion, in Uzhhorod, Ukraine, April 26, 2022. REUTERS/Serhii Hudak TPX IMAGES OF THE DAY 

Children depict a Soviet monument to a friendship between Ukrainian and Russian nations after its demolition, amid Russia's invasion of Ukraine, in central Kyiv, Ukraine April 26, 2022. REUTERS/Gleb Garanich TPX IMAGES OF THE DAY