Hydrogen is pumped into an observation balloon to inflate it, 1914. (8/20)

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Submitted to "Military Observation Balloons of WWI: Before Satellites And Drones, these Hot Air Balloons Were Used For Surveillance"
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Hydrogen is pumped into an observation balloon to inflate it, 1914.

Written by Benjamin Grayson

Former Bouquet seller now making a go with blogging and graphic designing. I love creating & composing history articles and lists.

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