During World War 1, Americans from various trades, including carpenters, painters, and women seamstresses, at work in an aircraft factory. Men and women work assembling Liberty aircraft engines to power DH-4 aircraft. Workers placing propellers on a row of assembled DH-4s in the factory. New DH-4s being started and tested on factory airfield. After testing, a DH-4 is painstakingly disassembled and packed for transport by train and ship to American units in France. In France, women carry airplane wings to an assembly shed where they are put back together and delivered to the flying units. Truckloads of aerial bombs being delivered to the airplanes. Armorers fusing and loading bombs under an airplane's wings, under watchful eye of the pilot.

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