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Pakistan floods 'most challenging aid operation'

19 September 2010 Last updated at 02:01 BST

The BBC's Aleem Maqbool has been travelling the length of the Indus River in Pakistan to assess the devastation caused by the flooding.

In his sixth instalment, Aleem visits the city of Sukkur in Sindh province and highlights the difficulties and risks associated with delivering aid to people.