GIS= (AIS TSAR ON Iaoh APPENDIX "BE" DRAFT LETTER TO THE PRESIDENT 1. A number of low yield nuclear devices for early entry into our defense stockpile, or important. to the most rapid advancement of improved weapons designs, will require testing in calendar year 1957. Such tests would include:. the proof- firing of certain air defense and anti-submarine weapons scheduled for early production; research ar development shots of fission devices of advanced design and for possible later production; and research shots of components of new type | thermonuclear devices. In addition, the Department of Defense and the Federal Civil Defense Administration have indicated a need to secure from any test series this year certain effects data important to the protection of our populace and military forces. shots, A portion of this data can be secured from diagnostic However, one or more special shots designed specifically to secure such effects information may be required, The Depart- ment of Defense Wishes also to conduct a systems test involving an air burst of the nuclear warhead in the new USAF air-to-air rocket following its launching from an interceptor aircraft. Finally, it will be necessary during the year to conduct certain safety tests -- tests wherein the high explosive is detonated to prove that no nucléar reaction will occur if the weapon, while safed, is subjected to fire or accident, and to determine any contamination which might result from the spread of nuclear material from weapons involved in fire or accident, 2. We currentiy estimate that some 25 nuclear shots will be required during the year and five or more safety tests, It is estimated that this number of shots will require about five ~ 23 (CU Ce Tae aiaHes TD Appendix "E"

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