(The Guardian) –  The UN secretary general, Ban Ki-moon, has made a dramatic intervention in the scandal of French peacekeepers allegedly abusing children in Africa by announcing an independent external review of how his organisation handled the affair. The move is the first public intervention by the secretary general into what has become a growing controversy for the UN. Pressure is growing on the organisation and on the French authorities to explain when and how they reacted to revelations by children in Central African Republic last year that they were being sexually exploited by French soldiers at a camp for internally displaced people.