Air Force says it has identified F-22 problems

The Air Force will gradually lift flight restrictions for the F-22 Raptor, expressing "very high confidence" that investigators have found what is causing oxygen-supply problems with the plane, a Pentagon spokesman said Tuesday. The first problem is a faulty valve on a high-pressure vest that Raptor pilots have worn during high-altitude missions. The valve caused the vest to inflate at the wrong time, which restricted a pilot's breathing.

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