Economic viability is one reason why technology goes to the Big Tech Graveyard in the Sky. That is where many once- feted inventions – from the supersonic Concorde to the super-high-def Blu-ray Disc – lie. Overtaken by cheaper and, in most cases, better options, they dodo-ed out. But the passenger airship vanished because of one high-visibility, shock- and awe-inducing disaster – when the German airship Hindenburg crashed into its mooring mast in New Jersey and burst into helium-fuelled flames 86 years 8 months 19 days ago on May 6, 1937. And, with that, we, cramped flyers, said goodbye to a luxury ocean liner-class flying experience.