1973 Paris Air Show.
Flew to Paris from Luton on a brand new Court Line Aviation Lockheed Tristar packed with 400 passengers. A real novelty in those days.
Seeing the Russian TU144 displayed in magnificent glory, then turning the corner to see Concorde for the first time and looking a little grotty in comparison to the TU144.
Arriving home the following day to see on TV the TU144 crash. Still vivid memories.