Sir David Nicholson has signed a wall at an NHS conference to "pledge to become a dementia friend," someone who is trained to help spot the early signs of the disease.
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Half of those killed or maimed in the last 72 hours of intense bombardments in Aleppo have been children.
Astronomers said: "Europa’s ocean is considered to be one of the most promising places that could potentially harbor life".
The rain will ease in the west tonight, but the cloud cover will remain across much of England, Wales and N. Ireland.