Wyman said that "a black dust was noted in some of the breathing hoses near the filters. We analyzed this dust and found it to be activated carbon." But no activated carbon was found in "30 pilots who had their throat swabbed for testing." Activated carbon is an inert form of charcoal that has been used in air filters for years. Nonetheless, the Air Force has decided to remove carbon filters from the F-22 pilot masks. The Air Force said Tuesday that no disciplinary action will be taken against the pilots for taking their concerns to "60 Minutes."

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