For European Recovery: The Fiftieth Anniversary of the Marshall Plan
http://lcweb.loc.gov/exhibits/marshall/

Senator Joe McCarthy -- A Multimedia Celebration
http://webcorp.com/mccarthy/
Sound clips.

Soviet Archives Exhibit
http://sunsite.unc.edu/expo/soviet.exhibit/entrance.html#tour
Documents from the Soviet Archives, including many relating to the USSR's relations with the United States

The Atomic Duty of Pvt. Bill Bires
http://www.aracnet.com/~histgaz/atomi/bires/
A veteran narrates the 1951 atomic tests in Nevada with official documents, photographs, and his own recollections.

The Cold War
http://www.execpc.com/~dschaaf/mainmenu.html
Pictures of the Berlin Wall and the Cuban Missile Crisis, plus the text of Churchill's Iron Curtain speech.

The Harry S Truman Library and Museum
http://www.trumanlibrary.org/
Exhibits, timelines, photos, documents, and links.

United States Army In The Korean War South To The Naktong, North To The Yalu (June-November 1950)
http://www.army.mil/cmh-pg/books/korea/20-2-1/toc.htm
The official Army account of the Korean War prior to the entrance of the Chinese.

USAF Museum Post-WWII History Gallery 1946-1950s
http://www.wpafb.af.mil/museum/history/postwwii/postww2.htm
Photographs and descriptions of the Air Force's role in the Berlin Airlift, the Cuban Missile Crisis, and photos of various aircraft.