David Cameron called for the next wave of international development targets to focus on extreme poverty.
The Prime Minister, in Liberia to attend a UN meeting, also insisted bolstering security and civil structures was crucial, alongside aid measures.
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Drying up across eastern parts this afternoon with showers continuing across Ireland.
Gordon Brown has said forced child migration schemes that continued until the 1970s amounted to "government-induced trafficking".
200 UK officers already working on the case are sifting through 15 tonnes of debris on each of the building's 24 floors.