The Helium Control Act (1927) controlled the export of helium outside of the United States. At that time, the US had a production monopoly on the gas. A secondary factor was the cost of helium due to the general scarcity of supply.
Hydrogen
Hydrogen gas was used to inflate the Hindenburg.
Hindenburg was filled with hydrogen.
Hydrogen isn't used for airships because it is highly flammable. It was one of the causes of the Hindenburg's burning.
passengers and hydrogen
Hydrogen.
Hydrogen!
The Hindenburg was filled with the element Hydrogen, which is extremely flammable. A spark ignited the hydrogen, which caused the skin of the zeppelin to burn furiously. The hydrogen fueled the inferno.
Hydrogen is infamous for its \high reactivity. The Hindenburg, which which used hydrogen as its buoyancy gas went down rapidly in flames due to the high reactivity of that hydrogen when it was ignited.
No, it was filled with hydrogen
Hydrogen is higly explosive ! Remember the Hindenburg disaster.
The gas was Hydrogen.