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David Cameron says he will "not bargain away" an EU referendum - as leaders lay out deal breakers for coalition talks.
Why mules are being targeted on the Iraqi-Turkish border
Mayweather held all the aces, says Ben Dirs
The debate over whether to re-open Mount Everest
What has modern life done to our digestive systems?
Why are all the manicurists in Los Angeles Vietnamese?
Taking on the pontiff's cricket team at the Vatican
Why resting in peace is no easy matter in Greece
Is it better to have leaders who are too old or too young?