The Air Force’s secret space plane sets a new record: 718 days in orbit

The Air Force’s secret space plane sets a new record: 718 days in orbit
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The Air Force began putting the space plane through its paces in 2010, with the first “Orbital Test Vehicle” (OTV) mission, which lasted 224 days. Each successive mission has lasted roughly 200 days longer than the previous flight, so the current mission, OTV…
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