"Oh, the humanity " Radio reporter Herbert Morrison's words on witnessing the destruction of the Hindenburg are etched in our collective memory. Yet, while the Hindenburg -- like the Titanic -- is a symbol of the technological hubris of a bygone era, we seem to have forgotten the lessons that can be learned from the infamous 1937 zeppelin disaster. Zeppelins were steerable balloons of highly flammable, explosive gas, but...