US President Barack Obama urges Turkey and Russia to calm tensions over the downing of a Russian warplane and to focus on fighting IS militants.
Seven men go on trial in Paris accused of recruiting fighters for the so-called Islamic State group, in the first such trial since the 13 November attacks.
A Turkish court reportedly orders a character assessment of Gollum from Lord of the Rings to see if comparing him to President Erdogan counts as an insult.
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The deadly attacks in Paris have raised questions about how Europe should be tackling homegrown extremism , writes the BBC's Europe editor Katya Adler
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