Scottish authorities say a health care worker who has just returned from Sierra Leone has been diagnosed with Ebola and is being treated in a Glasgow hospital. The Scottish government says the patient flew to Glasgow via Casablanca and London's Heathrow Airport, arriving late yesterday. The health care worker was admitted to a hospital this morning.The only previous case of the often-fatal disease in Britain was William Pooley, a nurse who contracted the disease while patients in Sierra Leone. He recovered after treatment in London and returned to West Africa. (More Ebola stories.)