Nuke ownership....
I never figured out all the fine points WRT the Genie rx and Canadian "rules".
Let's face it, the Voodoo had the Aim-4 IR doofers that went as a pair, and then the two Genie nukes. So we had three shots to thwart the Russian horde of buffs.
I never heard about the Canadian Zippers having the nuke capability. Hmmmm. But I was very young and clueless about many things back in 1966.
Those were very scary times, my friends. I am glad they remained scary and "back then".