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An alert issued this week has caught the attention of a country used to earthquake warnings.
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A BBC study lays bare the scale of flood defences in England that are in need of maintenance.
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After deadly cross-border military clashes, the Pakistani and Afghan governments have locked their populations in a trade war threatening the livelihoods of millions.
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In his second term, the president has oscillated between condemning Russia and threatening sanctions to berating Ukraine and pressuring it to give up its land.
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