Behind the scenes of the ventilator challenge

n Bristol, UK, huge hangars topped with solar panels buzz with activity. Inside, Rolls-Royce engineers are working on the latest in low-carbon technology, from lightweight engine fan blades to hybrid-electric generators and propulsion for next-generation fighter jets. And now, in a hangar normally used to train engineers, more than 100 people are diligently working to produce medical ventilators.
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