DENVER—The US Air Force's new Sentinel intercontinental ballistic missile is on track for its first test flight next year, military officials reaffirmed this week.
From April it will become a contractual requirement to monitor this and achieve it in 90% of cases.
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On the ground in one area is a bubble-wrapped empty coffin dating to 1799, with a smaller one next to it wrapped in masking tape - sobering reminders that this store is a snapshot of real lives once lived.
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