May 1942. Marine transport driver at New River, North Carolina. View full size. 4x5 Kodachrome transparency by Alfred Palmer, Office of War Information.

October 1942. B-25 bomber nose wheel and landing gear assembly at the North American Aviation plant in Inglewood, California. View full size. 4x5 Kodachrome transparency by Alfred Palmer for the Office of War Information.

June 1942. An M-4 tank at Fort Knox, Kentucky. View full size. 4x5 Kodachrome transparency by Alfred Palmer for the Office of War Information.

June 1942. An M-4 tank crew training at Fort Knox, Kentucky. View full size. 4x5 Kodachrome transparency by Alfred Palmer, Office of War Information.

Ed Smalle, "the singing comedian," at the keyboard circa 1922. View full size. 5x7 glass negative, George Grantham Bain Collection.

October 1908. South Bend, Indiana. "Going home to lunch! Two boys from Singer Manufacturing Company. Small boy is Charles Bailey, 316 Scholum Street. Is he 14 years old?" View full size. Photograph and caption by Lewis Wickes Hine.

August 14, 1924. President Calvin Coolidge and his radio-equipped Buick automobile in Washington. View full size. National Photo Company Collection.

June 1942. Boiler welder at Combustion Engineering in Chattanooga, Tennessee. View full size. 4x5 Kodachrome transparency by Alfred Palmer.

October 1942. "American mothers and sisters, like these women at the Douglas Aircraft Company plant in Long Beach, California, give important help in producing dependable planes for their men at the front." View full size. 4x5 Kodachrome transparency by Alfred Palmer for the Office of War Information.

May 1942. Marines training in barrage balloon technique at Parris Island, South Carolina. View full size. 4x5 Kodachrome transparency by Alfred Palmer.

Summer 1936. Children of sharecropper Frank Tengle at their Hale County, Alabama, cabin. View full size. 35mm nitrate negative by Walker Evans.

Summer of 1936. William Edward "Bud" Fields, wife Lily Rogers Fields and infant daughter Lilian at their sharecropper cabin in Hale County, Alabama. Photograph by Walker Evans for the Farm Security Administration. View full size.

Summer 1936. Lily Rogers Fields and two of her children in their Hale County, Alabama, cabin. Husband is cotton sharecropper Bud Fields. View full size. 35mm nitrate negative by Walker Evans for the Farm Security Administration.

Lester Picker listens to his shortwave radio through earphones while convalescing after breaking his back when he fell 55 feet erecting an aerial for the radio. Photograph by Underwood & Underwood, April 18, 1922. View full size. (Updated with additional information on Lester — click here and scroll down.)

A radio studio control room in British Mandate Palestine between 1936 and 1939. View full size. 5x7 dry plate glass negative, Matson Photo Service.