de Havilland DH-4
The versatile de Havilland DH-4 played many roles in both military and civilian capacities. In addition to its bombing activities in World War I, the DH-4 was an observation and photoreconnaissance aircraft. Between the Wars, the "Liberty Planes," as the DH-4s were called, took on many different jobs, including forest patrols and geologic reconnaissance. For 10 years they served as the Army Air Service's standard airplane for aerial mapping and photography.
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