Ukraine's Poroshenko Vows to Defend Mariupol from Separatists
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Ukraine's President Petro Poroshenko has vowed to crush Russia-backed rebels if they break a shaky cease-fire and attack the strategic port city of Mariupol. Poroshenko says Ukrainian forces and people in Mariupol are prepared to defend the city, but not everyone agrees. VOA's Daniel Schearf reports from Mariupol.