Chapter 1 - Introduction and Summary 7 To describe the personnel and administrative activities of Task Group 7.4, it is necessary to devote some preliminary remarks to the organization of the 950th Test Group (Nuclear) which isthe nucleus for Task Group 7.h. Unlike many components of Task Group 7.4, the 950th is not a transitory organization established only for participation in Operation HARDTACK, It is a permanent organization that is in being for the purpose of planning and directing Air Force participation in nuclear test operations both in Nevada and the Eniwetok Proving Grounds. In addition to Headquarters, 950th Test Group (Nuclear) which becomes Headquarters Task Group 7.4 for overseas tests, there are four squadron in the 950th. The 935th Air Base Squadron at Indian Springs Air Force Base, Nevada, is the primary support organization for all continental tests and has no role in the overseas operations. The 495lst Support Squadron at Eniwetok provides Air Base Support in the Eniwetok Proving Grounds. The 4926th Test Squadron (Sampling) is permantly stationed at Kirtland Air Force Base but spends a good part of each year TDY either at Nevada or the Eniwetok Proving Grounds, depending on where the tests are 33 AFWL/HO a?