The U.S. Air Force is still having problems with the pilot's air supply in its F-22 fighters. Recently, there were three more cases of F-22 pilots apparently experiencing problems. The term "apparently" is appropriate because the pilots did not black out and a thorough check of the air supply system and the aircraft found nothing wrong. There have been nearly 30 of these "dizziness or disorientation" incidents in the last four years. That's about one incident per hundred sorties. Only one F-22 has been lost to an accident so far and, while that did involve an air supply issue, it...