SERGEI CHUZAVKOV/AFP via Getty Images(NEW YORK) Russian President Vladimir Putin's "special military operation" into neighboring Ukraine began on Feb. 24, with Russian forces invading from Belarus, to the north, and Russia, to the east. Ukrainian troops have offered "stiff resistance," according to U.S. officials. The Russian military has since launched a full-scale ground offensive in eastern Ukraine's disputed Donbas region, capturing the strategic port city of Mariupol and securing a coastal corridor to the Moscow-annexed Crimean Peninsula. Here's how the news is developing. All times Eastern: Jun 21, 7:42 am American killed in Ukraine, officials say U.S. citizen Stephen Zabielski has died in Ukraine, the State Department confirmed to ABC News Tuesday morning. "We can confirm the death of U.S. citizen Stephen Zabielski in Ukraine," a State Department spokesperson said. "We have been in touch with the family and have provided all po
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