The Air Task Group was to be composed of Headquarters, Task Group 7.4, Provisional; the 4930th Test Support Group; the 493lst and 4932nd Test Support Squadrons; a cloud sampling and control detachment; an effects test detachment; a weather reconnaissance detachment; a documentary photo detachment; a weather detachment; and an aircraft control and warning detachment. A. ILLUSTRATION 2, opposite page, shows the organization of TG 7.4. FORMATION AND ORGANIZATION OF THE AIR TASK GROUP The Commander, Air Research and Development Command (ARDC), was given the over-all responsibility of organizing Task Group 7.4 for participation in CASTLE, In turn, ARDC delegated this responsibility to the Air Force | Special Weapons Center (AFSWC). In the Zone of the Interior (ZI) the AFSWC Commander was to exercise command over Headquarters, Task Group 7.4, except that the Commander,JTF SEVEN, would exercise operational control in the ZI for planning and coordination purposes. also to exercise operational control for The Commander, AFSWC, was planning and coordination, and administrative control -~ for funding and reporting only ~- in the ZI for units or detachments formed by other USAF comands.” During its Zone of the Interior stay the Air Task Group was to be under the operational control of Air Force Special Weapons Center, but in the Pacific Proving Ground the executive head would be JTF SEVEN. For the most part the Air Task Group was organized, manned, trained and equipped at AFSWC, under the direction of Brigadier General Howell M. Estes, Jr., AFSWC Deputy Commander for Overseas Tests and Commander of TG 7.4. Three subordinate organizations — the Test Aircraft, Test Support (4930th Test Support Group), and Test Services Units — would be under the operational control of the Task Group. These units performed the functions described in the mission. Brigadier General Howell M. Estes, Jr., of the Strategic Air Command (SAC), was named Commander of the Air Task Group in the book message /]