A few months ago, Air Force leaders noticed some very strange behavior from pilots in the cockpit of F-22 Raptor fighters. Some pilots sounded like they were drunk on the radio; others couldn't even remember how to use the radio during flights. Lab tests revealed not alcohol in the pilots' blood, but a host of toxic chemicals including oil fumes, anti-freeze and even propane.
It still isn't clear what the source is. It is a very nasty problem, since it's bad enough that the planes can't be used at all until the problem is fixed. For an already troubled project, this is bad news. Of course, it seems like all of the Air Forces projects are troubled right now.
Jay