Dr. Ihor Zyma, a leading researcher in brain cognitive activity, and his wife, Dr. Olesia Sokur, a prominent biological scientist, were killed in their sleep by a Russian drone attack on the first day of 2025.
The President says 370,000 soldiers were wounded, with half returning to combat. Earlier US President-elect Trump claimed Ukraine's "ridiculous" losses of 400,000 soldiers.
During what Ukraine described as the "largest" Russian air assault since the full-scale war began, F-16s were deployed for the first time in combat and one of them crashed, killing a Ukrainian pilot, Oleksii Mes.
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