Russian invasion of Ukraine – US continues to observe troop build-up near border

“There is still a significant Russian military presence near the border with Ukraine,” Kirby said, adding that the United States will continue to monitor the situation and express concern.

The Pentagon spokesman also clarified that the United States will continue flights over the Black Sea, since it is part of international waters.

“We will continue to fly and walk where international law allows us to do so,” Kirby said.

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