Ambassador Adlai Stevenson presented evidence of Soviet missiles in Cuba to the U.N. Security Council, 1962.
Ambassador Adlai Stevenson presented evidence of Soviet missiles in Cuba to the U.N. Security Council, 1962.
Thousands joined Martin Luther King, Jr. on the National Mall in 1963 to demand jobs, freedom, and civil rights for African-Americans.
Thousands joined Martin Luther King, Jr. on the National Mall in 1963 to demand jobs, freedom, and civil rights for African-Americans.
Helicopters dropped U.S. infantrymen into Vietnam’s Mekong Delta in 1967 as the war escalated.
Helicopters dropped U.S. infantrymen into Vietnam’s Mekong Delta in 1967 as the war escalated.
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