Air Force: Oxygen not related to crash

Investigators in oversized white hazardous materials suits were combing the site Friday where an F-22 Raptor crashed a day earlier. Air Force officials said a thorough investigation was being conducted in accordance with standard Air Force and Department of Defense policy, but military officials quickly dismissed one theory. Air Combat Command released a statement Friday afternoon saying despite initial media speculation, no indications point to the life support oxygen system.

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