| 31. | Gingrich ( DOWN ) : U . S . House Speaker increasingly resembles dirigible.
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| 32. | Dirigibles : the next big thing . 1934.
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| 33. | Meanwhile, somebody get the dirigible hangar ready.
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| 34. | The 1937 Hindenburg explosion killed 35 passengers and the promising hydrogen dirigible passenger industry.
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| 35. | McCalla Field was established in 1931 and dirigibles.
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| 36. | Ratigan frees himself and escapes on his dirigible with Fidget, holding Olivia hostage.
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| 37. | If the dirigible displaces exactly its weight, it hovers at a constant altitude.
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| 38. | During the 1930s, the Navy briefly used the air base for helium dirigibles.
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| 39. | The machine spins onto the dirigible, bursting the balloon and sending it aground.
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| 40. | The flight was of an unmanned, steam powered dirigible operated by Frederick Marriott.
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