Cap'n, you are, as usual, correct! The "Led Zeppelin" phenomenon was a direct result of Hitler's obsession with all things "Heavy": such as the research into "Heavy Water", which resulted in unraveling atomic secrets that ultimately led to the Hydrogen Bomb; and, of course, research into "Heavy Metal". There are few who walk under the sun today who know that "Heavy Metal" goes back to German engineers in pre-war Europe.