Mystery Aircraft Over Texas

As far as I know, this sort of thing has happened only once since 1956. That was when British magazines started getting eyewitness accounts and grainy photos of the Lockheed U-2, then operating out of RAF Lakenheath on its first spy flights over the Soviet Union. Classified programs have been exposed in all sorts of ways since then - for example, the A-12 Blackbird was disclosed under a degree of pressure.

See the full article at Aviation Week