A girl riveting machine operator at the Douglas Aircraft Company plant joins sections of wing ribs to reinforce the inner wing assemblies of B-17F heavy bombers, Long Beach, Calif. Better known as the "Flying Fortress," the B-17F bomber is a later model of the B-17, which distinguished itself in action in the south Pacific, over Germany and elsewhere. It is a long range, high altitude, heavy bomber, with a crew of seven to nine men -- and with armament sufficient to defend itself on daylight missions

WWII color photographs. Farm Security Administration/Office of War Information Color Photographs from the Library of Congress. The original images are color transparencies ranging in size from 35 mm. to 4x5 inches. Photographers working for the U.S. government's Farm Security Administration (FSA) and later the Office of War Information (OWI) between 1939 and 1944 made approximately 1,600 color photographs that depict life in the United States, including Puerto Rico and the Virgin Islands. The pictures focus on rural areas and farm labor, as well as aspects of World War II mobilization, including factories, railroads, aviation training, and women working.

The Boeing B-17 Flying Fortress is a four-engine heavy bomber developed in the 1930s for the United States Army Air Corps. Although Boeing lost the contract because the prototype crashed, the air corps was so impressed with Boeing's design that it ordered 13 more B-17s for further evaluation. The B-17 was primarily employed by the United States Army Air Forces in the daylight precision strategic bombing campaign of World War II against Germany. The B-17 also participated to a lesser extent in the War in the Pacific, early in World War II, where it conducted raids against Japan.