I think there is a difference between telling everyone "We have this really fast plane called the U2, and the Russians have been lobbing missiles at it. For the

I think there is a difference between telling everyone "We have this really fast plane called the U2, and the Russians have been lobbing missiles at it. For the moment its fast/high enough to outrun them but this won't last forever" and telling them how fast/high. There is a middle ground between handing out out engineering information, and pretending it doesn't exist.