IX this operation, Headquarters USAF hereby directs organization of Task Croup 7.4, at earliest practicable date, . . The Commander, Task Group 7.4 is authorized to organize these units and elements as may be required by operational necessity," In the implementing instructions was the following list of units and elements including provisions for sampling: (a) Headquarters Task Group 7.) (Provisional), (b) Test Base Unit with the following elements: Support squadron Helicopter element (c) Test Aircraft Unit with the following elements: Cloud sampling element (augumented by 6 SAC B-S7D aircraft), Air Force effects elements (includes IBDA, VHA/UHA, {onosphere elements), Navy effects element (to be provided by NASWF, Kirtland AFB, New Mexico, and attached to the Test Aircraft Unit for operational control), (d) Test Service Unit with the following elements: Search and rescue element (to include weather island re-supply). Weather reporting and forecasting element. Weather reconnaissance element, Communications element (AACS), Weather central element, MATS terminal element, Aerial photo element, 7 Foreseeing the difficulties from non-Air Force organizations as in earlier tests, Special Weapons Center officials took early action to insure positive orders were issued to all supporting commands by Air Force headquarters, "Book Message" became the byword, and several drafts of the proposed Air Force message were prepared and coordinated in the hopes of evolving a directive which would effect the required actions by Air 176 SWEH -2-003h, 4 APWL/HO (e