The runways at Heathrow Airport were de-iced this morning but all flights are running as usual and there have been no delays or cancellations, a spokeswoman said.
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A student has reportedly shot at his companions and a teacher at an American college.
An eight-year-old girl died suddenly last week after she collapsed in the classroom, suffering from a brain aneurysm.
The 72-year-old had to be helicoptered from the mountain, when he was just a few hours from the summit on Monday.