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Ideas need to be mobilised if the learning years are safeguarded, writes Simon Schama
The group has not yet displaced existing threats from the Muslim world, writes Ahmed Rashid
At least 20 militants and policemen dead in gun battle in Chechen capital
Attack is first major violent incident in Chechnya for 4 years
Moscow has lost its authority over the region – no one else has gained it, writes Thomas de Waal
Mystery of what lies behind the Boston attacks
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