WARSAW — A group of Ukrainian teenagers marked President Joe Biden’s arrival in Poland by joining a protest to call for NATO to intervene to stop Russian air and missile strikes against their country.

The young women protesting are a few of the millions of women and children permitted to leave Ukraine, as martial law requires their male relatives to remain at home and bombardments prevent the departure of countless others. Russian President Vladimir Putin claimed that the military campaign was necessary to protect Russian-speaking people, but the aggression has prompted these Ukrainians to develop a distaste for the Russian language, anxiety about their relatives and compatriots, and disappointment with Western powers, who have not enacted a no-fly zone despite pleas from Ukraine.