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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Broadcaster PBS halted distribution of his nightly interview show and CBS News immediately suspended the 75-year-old.
Twenty years ago I reported from Mostar at the end of the Bosnian War. I returned to be reunited with some of the children I filmed then.
Around 60 firefighters tackled the blaze at the four-storey building in Daleham Gardens, Hampstead, that broke out early on Tuesday.