On what day did The Hindenburg, a German hot-air balloon, explode into flame and kill 36 people?

It was a zeppelin or a "blimp" definitely not a hot air ballon.

Such a sad tragedy.

I find it amazing that almost 2/3 of the people onboard survived.

The U.S. controlled most of the worlds helium supply and forced Germany to use the flammable hydrogen. The league of nations had an embargo in place against Germany due to WW1.

Player #25874027, Extremely flammable! Have you seen the sun?!

Oh the Humanity ! Does anyone remember seeing the movie in theatres as a child ?

British airships also used hydrogen, notably R101, also lost by accident (although in this case hitting the ground at night). Although the USA used non flammable helium they lost more airships than any other nation, mainly due to structural failure. Hydrogen is not flammable in most cases as it is not mixed with oxygen, and it was notoriously difficult for the RFC/RAF to shoot down German airships (known as Zeppelins but many were made by another company), many of those that were destroyed did not catch fire but ins crashed because of loss of hydrogen through bullet holes.

Kris, It was using hydrogen for lift . Hydrogen is flammable . This accident is why it is no longer used

Terri, "Oh, the humanity!"

Rosie-knees, it was hydrogen!