^ regarding alternative fuel, i thought you do not need to tank hydrogen in a car with fuel cells. The fuel cells produce as much hydrogen as is needed
at the moment, there is no need for a storage. I wonder what they "tank" into the Mirai, because if it is hydrogen it would not need fuel cells.
Regarding the Hindenburg.. as said before, not possible with fuel cells because not enough hydrogen.
edit: i was wrong. The Mirai tanks hydrogen, and burns it with oxygen to generate energy - so the Mirai has hydrogen tanks.
Regarding danger of explosion normal fuel is not harmless as well.. but we got used to it.
http://www.popsci.com/how-hydrogen-vehicles-work