The cause of the infamous Hindenburg crash has baffled expertsfor over 80 years, with theories about the airship's fireranging from deliberate sabotage to a spark generated by thestormy conditions in which it landed. But new,never-before-seen amateur footage of the crash has surfaced,showing the airship's final seconds from a fresh angle and inunrivaled clarity. Taking clues from the footage and othersources, NOVA leads a fresh investigation at a leadingscientific lab with eye-opening experiments that point to afinal solution of the mystery.