Nah, the first "International Event" was held in East Grinstead using a local theater as the venue in the latter part of 1968.
In the begining of 1968, based from London, I was responsible for conceiving of it and getting it going but, typical of the org hierarchy to never let a good idea go un-stolen, they usurped control and I later got booted off staff (for which I now thank them!! )
You'll see references to the Int Scientologists being denied entry into the UK for the event elsewhere on ESMB.
So YOU'RE the bastard! lol