General Sir Nicholas Houghton at the handover ceremony in Whitehall, London
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New Army chief Gen Sir Nicholas Houghton's hopes for the future

18 July 2013 Last updated at 12:53 BST

The new head of Britain's armed forces officially took over this morning with a parade in Whitehall in central London.

General Sir Nicholas Houghton said he faced many challenges in what he described as a ''particularly dangerous, unstable'' world.