Today's National Archive Primary Source Document

On August 5, 1963, the Limited Test Ban Treaty was signed by the United States, Great Britain, and the Soviet Union. After Senate approval, it was signed by President Kennedy on October 7, 1963. The treaty went into effect on October 11, 1963, and banned nuclear weapons testing in the atmosphere, in outer space, and under water.  Click below if you would like more information.

http://www.archives.gov/historical-docs/todays-doc/