[DOC] [TLE] LZ 129 Hindenburg - Wikipedia [PAR] LZ 129 Hindenburg was a large German commercial passenger-carrying rigid 
airship, the lead ship of the Hindenburg class, the longest class of flying machine 
and the largest airship by envelope volume. It was designed and built by the 
Zeppelin Company (Luftschiffbau Zeppelin .... Despite the danger of using 
flammable hydrogen, no alternative... [DOC] [TLE] The Hindenburg Disaster: 9 Surprising Facts - History in the Headlines [PAR] May 4, 2012 ... Explore nine surprising facts about the massive zeppelin and its fiery ... the 
Hindenburg disaster is the most famous airship accident in ... U.S. law prevented 
the Hindenburg from using helium instead of hydrogen, which is more flammable. 
... Hugo Eckener sought to use helium, a less flammable lifting gas. [DOC] [TLE] The Hindenburg Disaster - Airships.net [PAR] After more than 30 years of passenger travel on commercial zeppelins  in 
which ... of many hydrogen airships destroyed by fire because of their flammable 
lifting gas, ... The gas board used to valve hydrogen to keep the ship in trim. ..... 
Only 36 passengers flew on Hindenburg's first North American flight of 1937, far 
less... [DOC] [TLE] Hindenburg Disaster Myths: Rocket Fuel, Thermite, and Hydrogen [PAR] The Hindenburg and Hydrogen: The truth about the Hindenburg disaster. ... The 
Graf Zeppelin, Hindenburg, U.S. Navy Airships, and other Dirigibles .... The dope 
used on Hindenburg's silver-colored hull contained 5 parts aluminum to 1 .... 
Most flammable gases burn without color, which is why gas lanterns always use 
a... [DOC] [TLE] The Hindenburg was not Painted with Rocket Fuel - Airships [PAR] Aug 25, 2009 ... Blog  Graf Zeppelin ... The internet is filled with claims that the Hindenburg's 
flammable ... Instead, the fabric burned from behind, where the hydrogen fire was 
... by the Hindenburg's hydrogen gas cells and not by its fabric covering. ..... the 
US controlled the Helium and refused to sell any to the Germans,... [DOC] [TLE] Hydrogen, Chemical Element - reaction, water, uses, elements ... [PAR] Hydrogen is the most abundant element in the universe. Nearly nine out of ... He 
added iron metal to different acids and found that a flammable gas was produced
. But Cavendish ... Stars use hydrogen as a fuel with which to produce energy. .... 
So the United States refused to sell helium to the Zeppelin air-ship company. [DOC] [TLE] Aerospaceweb.org | Ask Us - Cause of the Hindenburg Disaster [PAR] Jun 18, 2006 ... The Hindenburg, also known as the LZ129, was a German airship built during the 
1930s. ... Zeppelin founded his own company that built several successful 
airships ... supply of helium, refused to sell the gas to a German company. The 
Hindenburg was instead modified to use hydrogen for buoyant lift, and... [DOC] [TLE] Hindenberg Allowed in US, Why? [Archive] - Straight Dope Message Board [PAR] A private company, located in a nation we are still at peace with and have ... And 
it's using hydrogen, not helium, because Germany supposedly has mastered how 
to safely use hydrogen, the more effective lifting gas but with the .... (president of 
the zeppelin airship firm), was hugely popular in the USA. [DOC] [TLE] BBC - Culture - The Zeppelin: Aboard 'the hotel in the sky' [PAR] Nov 26, 2014 ... Zeppelins like the Hindenburg offered the most luxurious air travel ever. ... 
tragedy lies in the US government's steadfast refusal to supply foreign countries, 
... Its substitute, highly flammable hydrogen, ensured the death of those ... the 
Graf Zeppelin or deflatable like the 'blimps' used for anti-aircraft defence... [DOC] [TLE] Films Media Group - Modern Marvels: Airships [PAR] The Goodyear-Zeppelin Company (03:37) ... Since then Germany, Great Britain, 
and the United States have experimented with and improved on airships for 
military ... Although still in use for sightseeing, surveillance, and research, the 
Hindenburg and other crashes ended the airship's role in luxury travel and in the 
military. [DOC] [TLE] The Hindenburg Disaster - Ancestry Insights - Ancestry.com [PAR] With 97 passengers

Question: The U.S. refused to sell this gas to the Zeppelin Aircraft Company, which used the more flammable hydrogen instead
Answer: helium