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Migrant boat sinks off Crete; Estonia and the cyber threat; pain drug Fentanyl explained.

Picture: A child eats a biscuit as he sits on the ground with refugees upon their arrival with a boat near the village of Finokalia in the southern Greek island of Crete on May 31, 2016. More than 2,500 people have died trying to make the perilous journey across the Mediterranean sea to Europe so far in 2016, the UN said on May 31. Credit: AFP/Getty Images