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By Gavin Esler
Presenter, BBC Newsnight
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Presented by Gavin Elser
Trident
Upgrading Britain's Trident missile system will mean building four - possibly three - new submarines by 2022 at a cost estimate at up to £20 billion. But do we need what is called an "independent nuclear deterrent?" And if so, against whom?
On the day a government minister - Nigel Griffiths - resigned over Tony Blair's plans to renew Trident, we'll debate the issue and try to figure out how far in 2007 the Labour party is still fighting the internal anti-nuclear battles of the 1950s.
Fraud
Why was the Serious Fraud Office investigation into British Aerospace bribery allegations so controversially dropped? For the first time you can hear it from the horse's mouth as the head of the SFO himself, Robert Wardell, gives his first broadcast interview on the row.
Climate Change
How green is my party? As Gordon Brown and David Cameron compete on being greener-than-thou, we examine the science once again. Despite the fact that most reputable scientists agree that human activity in raising carbon emissions is leading to global warming, could they - in fact - be wrong?