Other useful Cold War websites with primary source documents include:
Cold war origin documents from the Wilson Center Digital Archive. The site also has other relevant collections, including the End of the Cold War. All have full text materials for downloading. Also associated with it is the Cold War International History Project (CWIHP) whose website includes working papers, podcasts and reports covering all aspects of Cold War History.
Parallel History Project covers both NATO and the Warsaw Pact focussing on military security declassified documents. Thousands of documents on the security aspects of the Cold War.
Project Avalon– from Yale university has a collection of materials covering incidents such as Cuban Missile Crisis, U2 incident (1960)