Three people were killed by a shooter on Friday at Naval Air Station Pensacola, a major US Navy base in Florida, before sheriff’s deputies fatally shot the shooter, authorities said, the second deadly shooting at a US military installation this week.An “active shooter” was encountered on the base on Friday morning, according to the Escambia County sheriff’s office.A few minutes later, the shooter was dead, officials said.A sheriff’s deputy fatally shot the shooter in a classroom on the base,…

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