Ukrainian military track burns at an air defence base in the aftermath of an apparent Russian strike in Mariupol, Ukraine, Thursday, Feb. 24, 2022. Russian troops have launched their anticipated attack on Ukraine. Big explosions were heard before dawn in Kyiv, Kharkiv and Odesa as world leaders decried the start of a Russian invasion that could cause massive casualties and topple Ukraine's democratically elected government. (AP Photo/Evgeniy Maloletka)
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