Apprentice air traffic controllers train with model aircraft at Andrews Air Base in Maryland, March 1957.
Photograph by Robert F. Sisson and Donald McBain, National Geographic
A view of two dead cones that dot the floor of the Haleakala Crater in Hawaii, February 1924.
Photograph by Gilbert Grosvenor, National Geographic
An informal portrait of photographer and explorer Luis Marden in Chichen Itza, Mexico, 1936.
Photograph by Luis Marden, National Geographic
A woman perches above red algae in a stagnant pool inside Anemone Cave on Mount Desert Island, Maine, September 1952.
Photograph by Luis Marden, National Geographic
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A rhinoceros charges the photographer in Africa, May 1910.
Photograph by A. Dugmore, National Geographic
Sightseers park to watch a Stratocruiser taxi across an underpass in Queens, New York, March 1951.
Photograph by B. Anthony Stewart, National Geographic
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