F-22 still under the microscope

As an investigation continues into oxygen-deprivation issues involving the F-22 Raptor fighter, Air Force officials say they’re optimistic about the program’s future and the jet’s ability to perform. Several F-22 pilots have complained about blackouts in the cockpit. Maj. Gen. Charles W. Lyon said previously unexplained F-22 physiological incidents, were a result of a combination of factors related to oxygen delivery system components,” He says corrective action is under way.”