Punching rivet holes in a frame member for a B-25 bomber, the plant of North American Aviation, Inc., Calif.

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.