Twelve leading Democratic Party contenders take part in another televised debate

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The twelve leading contenders to be the Democratic Party candidate for the White House are taking part in a televised debate in Ohio. President Erdogan of Turkey has ruled out a ceasefire in his offensive against the Syrian Kurds, despite US sanctions. Scientists say the humpback whale population of the southwest Atlantic has almost fully recovered, two centuries after they were hunted to the brink of extinction.