Ebola concern, Trump's Cassidy retribution and Eurovision

The World Health Organization declares the Ebola outbreak in the Democratic Republic of Congo and Uganda a public health emergency of international concern. Republican Senator Bill Cassidy loses his Louisiana primary in a victory for U.S. President Donald Trump's retribution campaign, with Trump-backed challengers advancing to a June runoff. Ukraine launches its largest drone attack on Moscow in over a year. Plus, Bulgaria wins Eurovision for the first time as five countries boycott over Israel's participation.

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