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Today in World War II History—Apr. 22, 1943

US Navy PBY Catalina on patrol, 1942-43 (US Navy photo)

US Navy PBY Catalina on patrol, 1942-43 (US Navy photo)

75 Years Ago—Apr. 22, 1943: US Navy PBY Catalinas based in Iceland and Greenland drive off U-boats threatening Allied convoy HX-234.