Bozhena Denisova, 9, cries as she marches against Russia's invasion of Ukraine during a rally in Philadelphia, Pennsylvania, U.S., March 27, 2022. REUTERS/Rachel Wisniewski 

Viktoria Shpylchak waves a flag on top of her father Ivan Shpylchak's shoulders at a protest against Russia's invasion of Ukraine in Philadelphia, Pennsylvania, U.S., March 27, 2022. REUTERS/Rachel Wisniewski 

A person holds a sign during a demonstration against Russia's invasion of Ukraine, at the Angel of Independence monument in Mexico City, Mexico, March 27, 2022. REUTERS/Luis Cortes 

People protest opposite the Russian Embassy, amid Russia’s invasion of Ukraine, in London, Britain, March 27, 2022. REUTERS/Henry Nicholls 

A woman wears a flower crown as she takes part in a demonstration in support of Ukraine at Trafalgar Square, amid Russia's invasion of Ukraine, in London, Britain March 26, 2022. REUTERS/Tom Nicholson TPX IMAGES OF THE DAY 

Demonstrators display flags and signs calling for the closure of Ukrainian airspace during a “Stand with Ukraine” rally at the Lincoln Memorial on the National Mall in Washington, U.S., March 27, 2022. REUTERS/Tom Brenner 

A sign is displayed as people gather to protest against Russia's invasion of Ukraine during a rally in Philadelphia, Pennsylvania, U.S., March 27, 2022. REUTERS/Rachel Wisniewski 

Wearing Ukrainian-colored face paint, Nikita Kazimirov looks on during a “Stand with Ukraine” rally at the Lincoln Memorial on the National Mall in Washington, U.S., March 27, 2022. REUTERS/Tom Brenner 

People march against Russia's invasion of Ukraine during a rally in Philadelphia, Pennsylvania, U.S., March 27, 2022. REUTERS/Rachel Wisniewski 

A person holds a sign as choirs participate in the ''Coros por la Paz'' (Choirs for Peace) concert, in support of Ukraine, amid Russia's invasion, at Juan Goytisolo Square, Madrid, Spain March 27, 2022. The sign reads: ''Peace.'' REUTERS/Javier Barbancho 

Dom Streater cries at a rally against Russia's invasion of Ukraine in Philadelphia, Pennsylvania, U.S., March 27, 2022. REUTERS/Rachel Wisniewski 

A child attends a rally to protest against Russia's invasion of Ukraine in Philadelphia, Pennsylvania, U.S., March 27, 2022. REUTERS/Rachel Wisniewski 

People gather to protest against Russia's invasion of Ukraine during a rally in Philadelphia, Pennsylvania, U.S., March 27, 2022. REUTERS/Rachel Wisniewski 

A child sketches a Ukrainian flag with markers during a “Stand with Ukraine” rally at the Lincoln Memorial on the National Mall in Washington, U.S., March 27, 2022. REUTERS/Tom Brenner 

Miriam Gabay attends a protest against Russia's invasion of Ukraine in Philadelphia, Pennsylvania, U.S., March 27, 2022. REUTERS/Rachel Wisniewski 

People hold up their phones with flashlights on as they attend the charity concert ''Yes We Care'' for Ukraine, amid Russia's invasion, in Vienna, Austria, March 27, 2022. REUTERS/Leonhard Foeger 

People gather to protest against Russia's invasion of Ukraine during a rally in Philadelphia, Pennsylvania, U.S., March 27, 2022. REUTERS/Rachel Wisniewski 

Ukrainian flag flutters as people attend the charity concert ''Yes We Care'' for Ukraine, amid Russia's invasion, in Vienna, Austria, March 27, 2022. REUTERS/Leonhard Foeger 

Pro-Ukrainian demonstrators gather near the reflecting pool at the Lincoln Memorial during a “Stand with Ukraine” rally on the National Mall in Washington, U.S., March 27, 2022. REUTERS/Tom Brenner 

A supporter of Ukraine cries at a rally against Russia's invasion of Ukraine in Philadelphia, Pennsylvania, U.S., March 27, 2022. REUTERS/Rachel Wisniewski 

People demonstrating in support of Ukraine gather outside the Houses of Parliament, amid Russia’s invasion of Ukraine, in London, Britain, March 27, 2022. REUTERS/Henry Nicholls 

Anna embraces Iryna while listening to a pre-recorded video of Ukraine President Volodymyr Zelenskyy, during a “Stand with Ukraine” rally at the Lincoln Memorial on the National Mall in Washington, U.S., March 27, 2022. REUTERS/Tom Brenner 

People demonstrating in support of Ukraine gather outside the Houses of Parliament, amid Russia’s invasion of Ukraine, in London, Britain, March 27, 2022. REUTERS/Henry Nicholls 

Oksana Markarova, Ukrainian ambassador to the United States, speaks during a “Stand with Ukraine” rally at the Lincoln Memorial on the National Mall in Washington, U.S., March 27, 2022. REUTERS/Tom Brenner 

Rally attendees display flags and listen to the playing of the Ukrainian National anthem, during a “Stand with Ukraine” rally at the Lincoln Memorial on the National Mall in Washington, U.S., March 27, 2022. REUTERS/Tom Brenner 

Supporters of Ukraine embrace one another at a rally against Russia's invasion of Ukraine in Philadelphia, Pennsylvania, U.S., March 27, 2022. REUTERS/Rachel Wisniewski 

Pro-Ukrainian attendees watch a speaker present during a “Stand with Ukraine” rally at the Lincoln Memorial on the National Mall in Washington, U.S., March 27, 2022. REUTERS/Tom Brenner 

People demonstrating in support of Ukraine gather outside the Houses of Parliament, amid Russia’s invasion of Ukraine, in London, Britain, March 27, 2022. REUTERS/Henry Nicholls 

Demonstrators display flags and signs calling for the closure of Ukrainian airspace during a “Stand with Ukraine” rally at the Lincoln Memorial on the National Mall in Washington, U.S., March 27, 2022. REUTERS/Tom Brenner 

Pro-Ukraine demonstrators display signs and hoist Ukrainian flags, during a “Stand with Ukraine” rally at the Lincoln Memorial on the National Mall in Washington, U.S., March 27, 2022. REUTERS/Tom Brenner 

A girl holds a placard during a demonstration in support of Ukraine, amid Russia's invasion of Ukraine, in central London, Britain March 26, 2022. REUTERS/Tom Nicholson 

People take part in a demonstration against Russia's invasion of Ukraine, at the Angel of Independence monument in Mexico City, Mexico, March 27, 2022. REUTERS/Luis Cortes 

People demonstrating in support of Ukraine gather outside the Houses of Parliament, amid Russia’s invasion of Ukraine, in London, Britain, March 27, 2022. REUTERS/Henry Nicholls 

People demonstrating in support of Ukraine gather outside the Houses of Parliament, amid Russia’s invasion of Ukraine, in London, Britain, March 27, 2022. REUTERS/Henry Nicholls 

People hold signs during a demonstration against Russia's invasion of Ukraine, at the Angel of Independence monument in Mexico City, Mexico, March 27, 2022. REUTERS/Luis Cortes 

Ukraine's President Volodymyr Zelenskiy speaks via video link during the charity concert ''Yes We Care'' for Ukraine, amid Russia's invasion, in Vienna, Austria, March 27, 2022. REUTERS/Leonhard Foeger 

People demonstrating in support of Ukraine gather outside the Houses of Parliament, amid Russia’s invasion of Ukraine, in London, Britain, March 27, 2022. REUTERS/Henry Nicholls 

Choirs participate in the ''Coros por la Paz'' (Choirs for Peace) concert in support of Ukraine, amid Russia's invasion, at Juan Goytisolo Square, Madrid, Spain March 27, 2022. REUTERS/Javier Barbancho 

A woman holding a placard takes part in a demonstration in support of Ukraine at Trafalgar Square, amid Russia's invasion of Ukraine, in London, Britain March 26, 2022. REUTERS/Tom Nicholson