The Hindenburg disaster

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Across
  1. 2. to catch fire or cause to catch fire.
  2. 5. A very sad event, especially one involving death or suffering.
  3. 6. A type of rigid airship named after the German inventor Count Ferdinand von Zeppelin.
  4. 9. Designed to cause fires.
Down
  1. 1. Easily set on fire.
  2. 2. A large and destructive fire.
  3. 3. A violent and sudden release of energy, often with a loud noise and the explosion of material.
  4. 4. The German airship name LZ 129 that crashed in 1937 leading to one of the most infamous air disaters in hisotry.
  5. 7. A large aircraft that relies on gas lighter than air so saty aloft
  6. 8. A sudden event causing widespread destruction, distress, or loss.