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Astronaut Buzz Aldrin posed with the U.S. flag on the first lunar landing, July 20, 1969.
Astronaut Buzz Aldrin posed with the U.S. flag on the first lunar landing, July 20, 1969.
Earth Day, initiated in 1970, became an annual celebration drawing attention to environmental concerns.
Earth Day, initiated in 1970, became an annual celebration drawing attention to environmental concerns.
Immigrants from many countries took the oath of citizenship in Seattle on July 4, 1993.
Immigrants from many countries took the oath of citizenship in Seattle on July 4, 1993.
The Erie Canal, completed in 1825, provided passage from the Hudson River to Lake Erie.
The Erie Canal, completed in 1825, provided passage from the Hudson River to Lake Erie.
Webster’s Reply to Hayne, by George P. A. Healy, 1851
Webster’s Reply to Hayne, by George P. A. Healy, 1851
Benjamin Tappan, by P. E. Reason, after a painting by Blanchard, 1840
Benjamin Tappan, by P. E. Reason, after a painting by Blanchard, 1840
The United States Senate, A.D. 1850, by P.F. Rothermel, engraved by R. Whitechurch, ca. 1855
The United States Senate, A.D. 1850, by P.F. Rothermel, engraved by R. Whitechurch, ca. 1855