A senior Air Force official told Congress this week that negative action will not be taken against qualified F-22 Raptor pilots who refuse to fly because of safety concerns -- including the two servicemen who spoke out about the issue on a national television program. The F-22 fleet has been plagued by an unsolved oxygen generation problem since last spring that has caused pilots, on about 25 occasions, to experience hypoxia-like symptoms in the air. Some Air Force pilots have...