From Hal Bogner, by email (originally posted here):
As the youthful chief organizer of that unplayed match in Pasadena (Los Angeles), 1983, it was a great privilege and pleasure to host Viktor in the preceding weeks, and throughout the US Open Championship which he won (along with GM Larry Christiansen) ahead of 840 players. Our story, too, has remained untold for decades, but our organizing committee intended only to hold this most important event, and not to affect the future of chess through political acts. Therefore, when FIDE president Florencio Campomanes informed us that he had arranged for Hungarian GM Zoltan Ribli to be waiting in western Europe, ready to fly to California
and seal the forfeits he had declared of Kasparov and of former world champion Vasily Smyslov, we absolutely refused to host such a match.
Besides yourself, Garry, few could have been happier than our group in California when the Candidates cycle was reset and your match with Viktor took place in London.
Hal Bogner, California, USA