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National
Air and Space
Museum
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Douglas M-2
The M-2 was a fast, sturdy, dependable airplane designed
to replace the de Havilland DH-4s in the U.S. Aerial Mail Service. The
Post Office Department purchased a series of the Douglas airplanes (M-1,
M-3, and M-4) and found they were much more efficient than the earlier
de Havillands
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