APPENDIX A Announced United States Nuclear Detonations Yields are listed as: Low (less than 20 kt) Intermediate (20 to 999 kt inclusive) Low Megaton (one to several megatons). Prior to October 1958, testing was conducted on an intermittent basis and each series of tests was designated by a series name, such as OPERATION CROSSROADS. The United States conducted no tests from October 30, 1958 to September 1961. After resumption of testing, tests were conducted year around and were listed by fiscal year. For example, all NTS tests during FY-1962, which ended June 30, 1962, were in the OPERATION NOUGAT series except for four surface tests (Little Feller I and II, Small Boy and Johnny Boy) designated DOMINIC II, which were a continuation of the DOMINIC I series conducted in the Pacific. 7