A couple of years after the US government decided to show the Stealth at airshows, I found myself at a popular airshow taking photographs of this flying wing...only to have no pictures develop on my film.(They would only do fly-overs). The result was sky only. Maybe I missed the shot, probably not. For years I showed people pictures of my "Stealth",they all thought I was crazy.
---Fast-forward five years, to when Princess Diana got into her fatal car crash, there were some articles that said the limo she was in, did not have some "photographic blocking" technology, due to the fatal limo being called suddenly into action... When I read this, I realized that in it's earliest years of being "shown" to the public, the Stealth bombers had some kind of technology within them that blocked you from photographing them.