The above is true.
Quite a few years ago, a regional piston-engine was intercepted by something, for no apparent reason.
At same time a Sabre had been reported taxiing at Bundy and a cat farted in West Wyalong.
When questioned about it, the gov't denied knowing anything. There had been a RR Viper crated in a box in the 60s but it was never seen again.
Does anyone have any info on this?