An empty playground is seen at an apartment block, amid Russia's invasion of Ukraine, in Kramatorsk, Donetsk region, Ukraine, May 25, 2022. More than 1 million children have fled Ukraine to neighboring countries in the less than two weeks since Russia started its invasion of Ukraine, the head of the United Nations Children's Fund (UNICEF) said early in March. Picture taken May 25, 2022. REUTERS/Carlos Barria