High-angle view of traffic and pedestrians using the Golden Gate Bridge, San Francisco, California, circa 1937

Golden Gate Bridge under construction with the Pylon #1 and the North and South Towers rising above Fort Point, San Francisco, California, April 1935.

employee test gas masks at the chemical development laboratory in Philadelphia in 1919

Construction of the Grand Coulee Dam March 1938

construction of the Golden Gate Bridge with men on the catwalks working on the cables, San Francisco, California, 1937. Alcatraz Island can be seen in the background

Canyon de Chelly panorama of valley from mountain in 1941,

construction of the Golden Gate Bridge with a view of the catwalks being placed under the cables, 1936.

chief Engineer of National Parks Frank Kettredge with his chief counsel George H. Harlan on the Golden Gate suspension bridge in San Francisco, 1937

1970s Globe Chowk near Islamia Science College - Karachi

1951 Funeral Process of Pakistan's 1st Prime Minister Liaquat Ali Khan passing through streets of Karachi

A German pigeon loft is pictured on the Western Front, in this 1916

A German officer of Flieger Abteilung 280 reads a book in a chateau where he is stationed near the Western Front, in this 1918

Cedar St. St. Paul c.1908

Canyon de Chelly in 1873

Canyon de Chelly, 1904