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America\u2019s envoy claimed \u201cexcellent progress\u201d in negotiations ahead of the country\u2019s planned exit from Afghanistan. But stickier talks await, between the Islamist militia and the Afghan government. A promising new vaccine may at last tackle typhoid fever, which claims 160,000 lives every year. And, we travel to Scotland and hop on the world\u2019s shortest scheduled flight.