that this is what's left of the 3-storey engineering structure. >> on a november morning in 2006, layonof others clocked in at secure plane, the charger. >> and i started a pot of coffee. i went into the lab and started unit. >> then it happened. >> there was a loud explosion. all of a sudden i was laying on the floor. there it was, coming out the side of this battery, it was about that big, and it wasn't like fire, it looked like a jet afterburner, like jet exhaust. . >> the prototype battery that exploded. >> i heard a loud series of metallic ravelling bangs. and just a jet of steam. the fire was literally rolling up the walls around me and on the ceiling. i could see it eating up all around me. i know that if that happened on board an aircraft, there would be no chance of survival. >> it was the biggest chemical fire in tuscon's history. a 10,000 square foot, 3 storey structure burnt to the ground. >> after my building burnt down, after that, they realised very emphatically the danger of this chemistry. richard luxo nose the chemistry of the battery. boeing chose the most powerful, b