American pilots at an Alaskan military base have reported a sudden spike of incidents in which they experienced an apparent lack of oxygen while flying the nation's most sophisticated fighter jets -- a mysterious, recurring problem that already caused the $77.4 billion fighter jet fleet to sit idle on the tarmac for months last year. In at least three incidents in the last two weeks, pilots of the $143 million-a-pop stealth F-22 Raptors at Joint Base Elmendorf-Richardson reported the "hypoxia-like" symptoms, leading the base to ground their F-22s for a day for "review," Air Force spokesperson Lt. Col. Regina Winchester...