security has been an abysmal failure. >> reporter: and worse, the f-22 has a potentially fatal flaw in the oxygen system that could cause its pilots to black out. the air force admitted this week some pilots are now asking not to fly the f-22 because the problem remains unfixed. >> if i knew what the problem was, it would be gone. i just have not found the problem yet. >> reporter: two years ago, captain jeffrey haney was killed when his oxygen was cut off and his f-22 crashed in alaska. but to the outrage of his family, the air force blamed him, not its expensive aircraft. >> he gave his life, and he just deserves the truth. >> reporter: this computer simulation, prepared by the air force, shows what happened to captain haney. >> the beeps going off are telling the pilot something is going wrong with the airplane. >> reporter: an abc news consultant said the instruments seemed to show that haney blacked out for at least 15 seconds and regained consciousness too late to save the plane.