A demonstrator offers a flower to a military police guard during an anti-Vietnam demonstration, 10/21/1967 (NARA)

Anti-Vietnam War rally on the National Mall, Washington, DC, 1971
(Leonard Freed/Magnum Photos)

American soldiers stand guard as Communist East Berlin puts up the wall, West Berlin, 1965 (L. Freed/Magnum Photos)

President Reagan & German Chancellor Helmut Kohl at the White House, 11/30/1984 (Reagan Library)

Coporal W. E. Thomas & Private 1st Class J. Jackson on Easter Morning, 03/10/1945 (NARA)

Erich Honecker & Angela Davis meeting in East Berlin, 09/11/1972
(Bundesarchiv)

Black Panther solidarity demonstration, Frankfurt/Main, 1969
(Frankfurter Stadtarchiv)

Blockade of a US military base for Pershing II missiles in Mutlangen, Germany
(H.G. Lambertz/Haus der Geschichte)

Protesters mingle with spectators attending the nuclear-powered aircraft carrier USS T. Roosevelt, 10/27/1984 (NARA)

African American exchange students at a Black Panther solidarity rally at the University of Frankfurt, 1971 (B. Klemm)

President Reagan & General Secretary Gorbachev signing the INF Treaty, 12/08/1987 (Reagan Library)

President Reagan, Vice-President Bush & General Secretary Gorbachev in New York, 12/07/1988 (Reagan Library)

Dr. Martin Luther King Jr. & Ralph D. Abernathy at the Berlin Wall, 09/14/1964 (Landesarchiv Berlin)

Coporal W. A. Smith & Sergeant S. Osborne with the 654th Tank Destroyer Battalion at Herne, Germany, 1945 (NARA)

President Reagan & Nancy Reagan visiting Disney World in Orlando, FL, 5/27/1985
(Reagan Library)

President Reagan at the Brandenburg Gate in Berlin, 6/12/1987
(Reagan Library)

President Reagan at a rally in Endicott, NY, 9/12/1984
(Reagan Library)

President Reagan & Nancy Reagan with singer Michael Jackson, 5/14/1984
(Reagan Library)

Civil Rights March on Washington, DC, 08/28/1963
(NARA)

Blockade of a US military base for Pershing-Missiles, Frankfurt, 10/24/1983
(The Granger Collection, NY)

Richard Nixon meeting with Elvis Presley, 12/21/1970
(NARA)