MYKOLAIV, Ukraine — It happened in a flash. Then she said an acrid smell filled her nostrils as it became clear her home had been hit by a Russian strike. Immediately, her thoughts turned to her 11-year-old son, Artem, she said. NBC News has chosen not to divulge the last name of Alla, her husband, Ruslan, and their son, Artem, for privacy and security reasons. After the attack on Mykolaiv, Ukrainian President Volodymyr Zelenskyy vowed that Moscow would be held responsible for every such strike.

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