Diana Konstantynova, 45 years-old, accountant from Vinnytsia, Ukraine, poses after an interview with The Associated Press at a refugee center in Brasov, Romania, Wednesday, March 30, 2022. The number of Ukrainians who have fled the Russian war reached the dramatic new landmark of 4 million people, the United Nations announced Wednesday, as Moscow kept up its attacks — even in places where it had vowed to ease its military operations. (AP Photo/Stephen McGrath)