A Stinson L-1A (formerly designated O-49) Vigilant light observation aircraft of the 123rd Observation Squadron, 70th Observation Group, flies low overhead an unidentified location in the Pacific Northwest. Note the full-span leading edge automatic slats, one of the features the two-seat L-1A offered to make it the Army’s first real short take-off and landing (STOL) aircraft. It was flown by the squadron into 1943. (142nd Wing History Archive)
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