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Letters: The process for selecting the secretary general is so poor that the case for reform speaks for itself: there is no job description, no timetable for the appointment and no formal scrutiny of candidates
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Karl Mathiesen: Ban Ki-moon has called on nations to do more to protect the environment from the devastation of war, but even in times of peace our militaries have a huge impact on natural resources
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Presidents of Ghana, Nigeria and Senegal in Burkina Faso to mediate amid power struggle but cross-party meeting descends into chaos
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UN and African Union representatives not allowed into western Dafur region where attacks on 200 women and girls reported
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Saleh, believed by some to be orchestrating Houthi rebel uprising, rejected purported demand to leave country by Friday or face international sanctions
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Small islands need debt relief to pay for climate change