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Ebola vaccine results are deemed 'remarkable'.
Everyone receiving it after coming into contact with ebola patient developed immunity.
Cameron criticised for his description of migrants as a "swarm".
So far this week more than 3000 people have attempted to get into Channel Tunnel.
Afghan government says Taliban leader Mullah Omar 'died in 2013'
His death has also been confirmed by a source close to the militant group's leadership.
Turkey bombs Kurdish rebel positions after soldiers attacked near country's frontier with Iraq.
NATO declaration of support for Turkey as it tackles instability along borders
Turkey and US agree to set up a buffer zone on the Syrian border.
Washington in talks with Ankara about intensifying attacks against IS militants in Syria.
Amber Rudd: I'm no climate change denier
New Climate Secretary says Conservatives committed to taking action
Obama tells BBC his biggest disappointment is lack of progress on gun control.
President speaks exclusively to BBC's North America editor on eve of visit to Kenya
Kurdish armed group the PKK says it murdered two Turkish policemen
PKK says murders were in retaliation for suicide bomb attack close to the Syrian border.
George Osborne: on the political centre ground?
Chancellor launches Spending Review - govt wants savings of £20 billion by 2019/20
David Cameron sets out his response to radicalisation.
PM declares determination to work with Muslim community over "poison" of extremism.