TOKYO -- In the weeks since a Japanese F-35A stealth fighter jet crashed into the Pacific Ocean, the U.S. and Japan have not yet found either the plane or the cause of the incident. But it could be linked to a system that has bedeviled the American military for years.
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F-35 crash shows problems still lurk behind stealth fighter
Oxygen supply system raises questions as search for pilot and plane continues
An F-35A fighter jet at the Paris Air Show. U.S. pilots of F-35s and other planes have reported symptoms that suggest an oxygen shortage. © Reuters
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