♪ you get the green sweats i get the red sweats we switch them up have christmas sweats ♪ >> herbert morrison famous words, oh, the humanity during what disaster. >> the hindenburg. >> 1936, crashed down in a ball of flames in new jersey. one of the things people don't know about the hindenburg is that no one has been able to provide a satisfactory explanation why or how the hindenburg crashed, until now that is. the folks from the discovery curiosity series are testing to see what might have actually brought the hindenburg down. the team put together three different 80-foot scale models of the hindenburg and recreated moments to figure out what happened. to tell us more about it we have one of the lead "curiousity" investigators. what happened. >> we wanted to know what started the fire. at the time of the crash there were theories about what had done it. some of the popular ones was explosive paint, another somebody shot it down. we took each of these theories, brought them into a lab setting and tested them. we were left with three worthwhile theories. we took those out and tested them and