The materials in this series relate to underground nuclear testing events between 1949 and 2000, including individual test events in the United States between 1957 and 1992. There is also a published report on underground testing in the USSR between 1940 and 1990. Additional materials include design and planning guides, operations directives, a ground shock overview from 2000, and several lists of underground nuclear tests in the United States between 1957 and 1992 that provide additional information about containment procedures.