The Ukrainian flags are set up to mourn for the victims of the Russian military invasion at Independence Square in Kyiv, Ukraine on June 23, 2022. A woman who lost her son during the battle at the Azovstal iron and steel works (Metallurgical Combine Azovstal) in Mariupol, southeast, stares at the flags.( The Yomiuri Shimbun via AP Images )

The Ukrainian flags are set up to mourn for the victims of the Russian military invasion at Independence Square in Kyiv, Ukraine on June 23, 2022. A woman who lost her son during the battle at the Azovstal iron and steel works (Metallurgical Combine Azovstal) in Mariupol, southeast, stares at the flags.( The Yomiuri Shimbun via AP Images )

The Ukrainian flags are set up to mourn for the victims of the Russian military invasion at Independence Square in Kyiv, Ukraine on June 23, 2022. A woman who lost her son during the battle at the Azovstal iron and steel works (Metallurgical Combine Azovstal) in Mariupol, southeast, stares at the flags.( The Yomiuri Shimbun via AP Images )

The Ukrainian flags are set up to mourn for the victims of the Russian military invasion at Independence Square in Kyiv, Ukraine on June 23, 2022. A woman who lost her son during the battle at the Azovstal iron and steel works (Metallurgical Combine Azovstal) in Mariupol, southeast, stares at the flags.( The Yomiuri Shimbun via AP Images )

The Ukrainian flags are set up to mourn for the victims of the Russian military invasion at Independence Square in Kyiv, Ukraine on June 23, 2022. A woman who lost her son during the battle at the Azovstal iron and steel works (Metallurgical Combine Azovstal) in Mariupol, southeast, stares at the flags.( The Yomiuri Shimbun via AP Images )

The Ukrainian flags are set up to mourn for the victims of the Russian military invasion at Independence Square in Kyiv, Ukraine on June 23, 2022. A woman who lost her son during the battle at the Azovstal iron and steel works (Metallurgical Combine Azovstal) in Mariupol, southeast, stares at the flags.( The Yomiuri Shimbun via AP Images )

The Ukrainian flags are set up to mourn for the victims of the Russian military invasion at Independence Square in Kyiv, Ukraine on June 23, 2022. A woman who lost her son during the battle at the Azovstal iron and steel works (Metallurgical Combine Azovstal) in Mariupol, southeast, stares at the flags.( The Yomiuri Shimbun via AP Images )

The Ukrainian flags are set up to mourn for the victims of the Russian military invasion at Independence Square in Kyiv, Ukraine on June 23, 2022. A woman who lost her son during the battle at the Azovstal iron and steel works (Metallurgical Combine Azovstal) in Mariupol, southeast, stares at the flags.( The Yomiuri Shimbun via AP Images )

The Ukrainian flags are set up to mourn for the victims of the Russian military invasion at Independence Square in Kyiv, Ukraine on June 23, 2022. A woman who lost her son during the battle at the Azovstal iron and steel works (Metallurgical Combine Azovstal) in Mariupol, southeast, stares at the flags.( The Yomiuri Shimbun via AP Images )

A boy looks at smartphone as he sits at on the verge of a grass plot decorated with small Ukrainian flags signed with the names of the Ukrainian servicemen killed in the war with Russia, in the center of Ukrainian capital of Kyiv on June 22, 2022. (Photo by Sergei SUPINSKY / AFP)

A man sticks into a grass plot small Ukrainian flags carrying the names of the Ukrainian servicemen killed in the war with Russia, in the center of Ukrainian capital of Kyiv on June 22, 2022. - Russia invaded Ukraine on Februray 24, 2022. (Photo by Sergei SUPINSKY / AFP)

A man sticks into a grass plot small Ukrainian flags carrying the names of the Ukrainian servicemen killed in the war with Russia, in the center of Ukrainian capital of Kyiv on June 22, 2022. - Russia invaded Ukraine on Februray 24, 2022. (Photo by Sergei SUPINSKY / AFP)

KYIV, UKRAINE - JUNE 21: Ukrainian flags are placed at the Independence Square to commemorate the Ukrainian soldiers, who lost their lives in the war, in Kyiv, Ukraine on June 21, 2022. Metin Aktas / Anadolu Agency/ABACAPRESS.COM

KYIV, UKRAINE - JUNE 21: Ukrainian flags are placed at the Independence Square to commemorate the Ukrainian soldiers, who lost their lives in the war, in Kyiv, Ukraine on June 21, 2022. Metin Aktas / Anadolu Agency/ABACAPRESS.COM

KYIV, UKRAINE - JUNE 21: Ukrainian flags are placed at the Independence Square to commemorate the Ukrainian soldiers, who lost their lives in the war, in Kyiv, Ukraine on June 21, 2022. Metin Aktas / Anadolu Agency/ABACAPRESS.COM

KYIV, UKRAINE - JUNE 21: Ukrainian flags are placed at the Independence Square to commemorate the Ukrainian soldiers, who lost their lives in the war, in Kyiv, Ukraine on June 21, 2022. Metin Aktas / Anadolu Agency/ABACAPRESS.COM

KYIV, UKRAINE - JUNE 21: Ukrainian flags are placed at the Independence Square to commemorate the Ukrainian soldiers, who lost their lives in the war, in Kyiv, Ukraine on June 21, 2022. Metin Aktas / Anadolu Agency/ABACAPRESS.COM

KYIV, UKRAINE - JUNE 21: Ukrainian flags are placed at the Independence Square to commemorate the Ukrainian soldiers, who lost their lives in the war, in Kyiv, Ukraine on June 21, 2022. Metin Aktas / Anadolu Agency/ABACAPRESS.COM

KYIV, UKRAINE - JUNE 21: Ukrainian flags are placed at the Independence Square to commemorate the Ukrainian soldiers, who lost their lives in the war, in Kyiv, Ukraine on June 21, 2022. Metin Aktas / Anadolu Agency/ABACAPRESS.COM

KYIV, UKRAINE - JUNE 21: Ukrainian flags are placed at the Independence Square to commemorate the Ukrainian soldiers, who lost their lives in the war, in Kyiv, Ukraine on June 21, 2022. Metin Aktas / Anadolu Agency/ABACAPRESS.COM