Bethlehem-Fairfield Shipyards, Baltimore. 1941. "Between the ways of this large Eastern shipyard run tracks for flatcars carrying materials or sections to be hoisted onto the deck of Liberty ships under construction." View full size. Medium format nitrate negative by Alfred Palmer.

Taken by sailor off the USS California in 1938. A nice shot of cars coming traveling the Bay Bridge (Thanks El Frijole). View full size.

November 1938. The Ak-sar-ben toll bridge over the Missouri River between Iowa and Nebraska at Omaha. View full size. Photograph by John Vachon.

May 1939. "Old cable ferry between Camden and Gee's Bend, Alabama." 35mm negative by Marion Post Wolcott, Farm Security Administration. View full size.

The Chain Bridge over the Potomac River circa 1865, with the Chesapeake & Ohio Canal in the foreground. View full size. Wet collodion glass plate negative by William Morris Smith. From negatives compiled by Milhollen and Mugridge.

View down the Chain Bridge over the Potomac near Washington circa 1865. Wet collodion glass plate negative by William Morris Smith. View full size.

Spring 1865. A closeup of the young ladies shown in an earlier post of the Canal Bridge at Seventh Street in Richmond, Virginia. View full size.

Spring 1865. Children on Canal Bridge at the foot of Seventh Street in Richmond after the fall of the city. Left half of a glass-plate stereograph. View full size.

May 1940. "Scraps of paper blowing on bridge." St. Louis, Missouri. 35mm nitrate negative by John Vachon for the Farm Security Administration. View full size.

February 1940. Government Bridge (or Arsenal Bridge) across the Mississippi River at Davenport, Iowa, on a snowy day. View full size. 35mm nitrate negative by Arthur Rothstein for the Farm Security Administration.

The Washington Bridge and High Bridge over the Harlem River along the northern boundary of Manhattan, looking south. Circa 1890 albumen print from a photograph by William Henry Jackson. Detroit Publishing Co. View full size.

New York City as seen from the Statue of Liberty circa 1901. Cyanotype by the Detroit Photographic Co. View full size.

December 7, 1941. Pearl Harbor, Hawaii. Small boat rescues a seaman from the 31,800-ton USS West Virginia. Note the two men in the superstructure. The USS Tennessee is inboard. View full size. Office of War Information.

December 1863. Bridge at Strawberry Plains, 20 miles northeast of Knoxville. Wet-plate glass negative by George N. Barnard, half of stereo pair. "These photographs are of the Siege of Knoxville, Nov.-Dec. 1863. The difficult strategic situation of the Federal armies after Chickamauga enabled Bragg to detach a force under Longstreet which aimed to drive Burnside out of East Tennessee and did shut him up in Knoxville, which he defended successfully. These views, taken after Longstreet's withdrawal on December 3, include one of Strawberry Plains, which was on his line of retreat. Barnard was photographer of the chief engineer's office, Military Division of the Mississippi, and his views were transmitted with the report of the chief engineer of Burnside's army, April 11, 1864. View full size.

Sheffield, Alabama (Tennessee Valley Authority). Kenneth C. Hall, his wife and daughter rowing on the Tennessee River. Photograph by Arthur Rothstein for the Tennessee Valley Authority, June 1942. View full size.