Ah, I forgot that one! Fortunately Quanthomme is here!
Viktor Stepanovich Grebennikov, biologist and paranormal researcher, discovered antigravity in the 70s through the observation of insects. Since then he has flown over Russia with his machine, but no luck, his camera has been scrambled, he revealed, so we have no record of his public demonstrations.
But we have a photo which shows that he undeniably succeeded!
- grebdemoplatefdecolle.jpg (47.48 KiB) Viewed 2169 times
My guess is that the invention was suppressed by the KGB because the Soviets could too easily have escaped from the USSR, and that the CIA helped, in order to protect the US oil industry. Another great invention suppressed by political powers and associated multinationals!