Facebook has announced its new "Graph Search" at its headquarters in San Francisco, California.
Its chief executive Mark Zuckerberg said the company's mission "is to make the world more open and connected", Engadget website reports.
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In other words, the Prime Minister will say that leaving the EU would not lead to a single EU law being abolished instantly.
Reclaim the Power stage a protest at Heathrow against a new runway or further airport expansion.
A colder night ahead as temperatures fall.