C'mon guys, cool it. I was one of the first to start this, back on post 10. Those in on the joke know, but let's not be critical of those who don't. It was an aircraft that was carrying out certain sensitive missions over sensitive territory, and the less we "ordinary people" knew of it's activities the better. Hence the "I didn't see it" idea arose. Just a jokey way of acknowledging it's existence, without asking questions of people who were not allowed to answer.