A Ukrainian soldier is seen at fighting positions on the line of separation from pro-Russian rebels near Donetsk, Ukraine, Monday, April 12, 2021. Ukraine's President Volodymyr Zelenskyy has requested to speak to Russian President Vladimir Putin about the Russian troop buildup along the Russian-Ukrainian border and the rising tensions in eastern Ukraine. But the request has been left unanswered so far, Zelenskyy's spokeswoman told The Associated Press on Monday. (AP Photo)