Parts of the downed F-117 wreckage -such as the left wing with us Air Force insignia, the cockpit canopy, ejection seat, pilot's helmet and radio -are exhibited at Belgrade's aviation museum.

Gerard Jouany, an aviation journalist, said that back-up systems would allow the pilots to radio, and said the tragedy must have been a combination of events that are unknown.

I was regarded as an expert not only on aviation and radio but on almost every other subject under the sun, except the Buddhist religion.