The North Korean regime alarmed nations around the world when it successfully launched a long-range rocket.
The Foreign Secretary William Hague summoned the ambassador of the secretive state to explain why it had flouted UN Security Council resolutions.
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Journalist Steve Hewlett, who shared his experience of battling cancer on BBC Radio 4, has died of the disease at the age of 58.
A long-time diplomat, Churkin had been Russia's permanent representative to the UN since 2006.