People take shelter in a subway station, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine February 24, 2022. REUTERS/Valentyn Ogirenko 

Cars drive towards the exit of the city after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine February 24, 2022. REUTERS/Valentyn Ogirenko 

People take shelter in a subway station, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine February 24, 2022. REUTERS/Valentyn Ogirenko 

A person walks past luggage carts at Boryspil International Airport after Russia launched a massive military operation against Ukraine, in Boryspil, Ukraine, February 24, 2022. REUTERS/Umit Bektas REFILE - CORRECTING AIRPORT'S NAME 

People wait at Boryspil International Airport after Russia launched a massive military operation against Ukraine, in Boryspil, Ukraine February 24, 2022. REUTERS/Umit Bektas REFILE - CORRECTING AIRPORT'S NAME 

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 

People walk as they flee from Ukraine at the Hungarian-Ukrainian border after Russia launched a massive military operation against Ukraine, in Tiszabecs, Hungary, February 24, 2022. REUTERS/Bernadett Szabo 

The baby, whose family has just fled the violence in Ukraine, is lifted onto a bus for transport away from the border, in Medyka, Poland, February 24, 2022. REUTERS/Bryan Woolston 

A couple, fleeing the violence in Ukraine, walk through the vehicle checkpoint lines at the border crossing, in Medyka, Poland, February 24, 2022. REUTERS/Bryan Woolston 

A bus driver turns people away, after filling his vehicle with evacuees who have just crossed the border, fleeing the violence in Ukraine, in Medyka, Poland, February 24, 2022. REUTERS/Bryan Woolston 

People line up to put their luggage in a car as they flee from Ukraine at the Hungarian-Ukrainian border after Russian President Vladimir Putin authorized a military operation, in Tiszabecs, Hungary, February 24, 2022. REUTERS/Bernadett Szabo 

A girl stands next to a car at the Hungarian-Ukrainian border after Russian President Vladimir Putin authorized a military operation in Ukraine, in Tiszabecs, Hungary, February 24, 2022. REUTERS/Bernadett Szabo 

A family arrives at the Polish border crossing after fleeing violence in Ukraine, in Medyka, Poland, February 24, 2022. REUTERS/Bryan Woolston 

Pixie, who said she was U.S. citizen, but did not give her last name, cries after crossing the border and fleeing the violence in Ukraine, in Medyka, Poland, February 24, 2022. REUTERS/Bryan Woolston TPX IMAGES OF THE DAY 

Cars drive towards the exit of the city after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine February 24, 2022. REUTERS/Valentyn Ogirenko 

Two women react after crossing the Polish border, as they flee violence in Ukraine, in Medyka, Poland, February 24, 2022. REUTERS/Bryan Woolston 

Cars drive towards the exit of the city after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine February 24, 2022. REUTERS/Valentyn Ogirenko 

People walk at the border crossing between Poland and Ukraine, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Medyka, Poland, February 24, 2022. REUTERS/Kacper Pempel 

A person holding a cat sits next to a bus window, as people go to western parts of the country after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine, February 24, 2022. REUTERS/Umit Bektas TPX IMAGES OF THE DAY 

People take shelter in a subway station, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine February 24, 2022. REUTERS/Valentyn Ogirenko 

A local resident sits in a car as they pack to leave the city, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Mariupol, February 24, 2022. REUTERS/Carlos Barria TPX IMAGES OF THE DAY 

People stand at the border crossing between Poland and Ukraine, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Medyka, Poland, February 24, 2022. REUTERS/Kacper Pempel 

People wait at a bus station to go to western parts of the country, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine, February 24, 2022. REUTERS/Umit Bektas 

A person walks past luggage carts at Boryspil International Airport after Russia launched a massive military operation against Ukraine, in Boryspil, Ukraine , February 24, 2022. REUTERS/Umit Bektas REFILE - CORRECTING AIRPORT'S NAME 

A woman and a child walk at the border crossing between Poland and Ukraine, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Medyka, Poland, February 24, 2022. REUTERS/Kacper Pempel 

People walk at the border crossing between Poland and Ukraine, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Medyka, Poland, February 24, 2022. REUTERS/Kacper Pempel 

People wait at a bus station to go to western parts of the country, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine, February 24, 2022. REUTERS/Umit Bektas 

People wait at Kyiv Airport after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, February 24, 2022. REUTERS/Umit Bektas 

People are seen in a subway station, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine February 24, 2022. REUTERS/Valentyn Ogirenko 

People are seen in a subway station, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine February 24, 2022. REUTERS/Valentyn Ogirenko 

People take shelter in a subway station, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine February 24, 2022. REUTERS/Valentyn Ogirenko 

People wait at a bus station to go to western parts of the country, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine, February 24, 2022. REUTERS/Umit Bektas 

Pixie and Blake, who said they were U.S. citizens but did not give their last names, walk with their luggage after crossing Polish border after fleeing from Lviv, Ukraine amid the widespread new Russian military operation, in Medyka, Poland February 24, 2022. REUTERS/Bryan Woolston 

People stand at the border crossing between Poland and Ukraine, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Medyka, Poland, February 24, 2022. REUTERS/Kacper Pempel 

Pixie and Blake, who said they were U.S. citizens but did not give their last names, embrace upon reaching the Polish border after fleeing from Lviv, Ukraine amid the widespread new Russian military operation, in Medyka, Poland February 24, 2022. REUTERS/Bryan Woolston 

People wait at a bus station to go to western parts of the country, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine, February 24, 2022. REUTERS/Umit Bektas 

People arrive at the Polish border crossing after fleeing from Ukraine and walking for three hours, in Medyka, Poland, February 24, 2022. REUTERS/Bryan Woolston 

People wait at a bus station to go to western parts of the country, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine, February 24, 2022. REUTERS/Umit Bektas 

A woman walks with a suitcase along a street, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine February 24, 2022. REUTERS/Valentyn Ogirenko 

People wait at Boryspil International Airport after Russia launched a massive military operation against Ukraine, in Boryspil, Ukraine February 24, 2022. REUTERS/Umit Bektas REFILE - CORRECTING AIRPORT'S NAME 

People ride the subway after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine February 24, 2022. REUTERS/Valentyn Ogirenko 

People wait to return to the city at Boryspil International Airport after Russia launched a massive military operation against Ukraine, in Boryspil, Ukraine February 24, 2022. REUTERS/Umit Bektas REFILE - CORRECTING AIRPORT'S NAME 

Cars drive towards the exit of the city after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine February 24, 2022. REUTERS/Valentyn Ogirenko 

Local residents are seen refueling at gas station after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Mariupol, February 24, 2022. REUTERS/Carlos Barria 

A child stands at the border crossing between Poland and Ukraine, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Medyka, Poland, February 24, 2022. REUTERS/Kacper Pempel