I knew a few folks who worked on the early implosion weapons and participated in the atmospheric test series; some of my bosses worked on the Mk 6 Mod 6, the last version of the Fat Man type system (highly improved electronics and fusing), which was retired in 1962.
thanks for this! i prepare an unclassified daily brief for my command. i put this link in there. i think it will be a nice palate cleanser for my readers from the hard news stories.