being a Military Air Transport Service (MATS) unit. One man whose unit is not identifed received the maximum exposure of the Enewetak group. Ent AFB, Colorado. Five officers from this base, headquarters of the Air Defense Command, were badged with TG 7.4, but their functions have not been identified. Their recorded exposures are higher than would be expected for simple liaison functions or observers. Officers from this base had served in IVY as radsafe personnel. Hamilton AFB, California. cations Service of the TSU. Two men from the 190lst Airways and Air Communi- (AACS) Detachment served in the Communications Element One received an exposure of 5 to 10 R. Hickam AFB, Territory of Hawaii. 47th Air Transport Squadron. Seven men. 49th Air Transport Squadron. Eight men. Slst Air Transport Squadron. Three men. 57th Strategic Weather Reconnaissance Squadron. Documentary Photo Element. Hq, TSUP.* Twelve men. Five men. Unidentified Unit. Twenty-three men. ' One hundred thirty-four men. The largest contingent of personnel from this base is not listed as being affiliated with any unit, so it is not possible to discuss its function and consequent exposure. Five exposures of 5 to 10 R are recorded; two other exposures exceeded 9.0 R. Identifiable areas of participation include air transport, weather reconnaissance, and documentary photo activity for the TSU (Provisional) of TG 7.4. Kirtland AFB, New Mexico. Aq Special Weapons Center. 4926th Test Squadron. Two men. One hundred fifteen men. 4932nd Test Support Squadron. Unidentified Unit. One man. Thirteen men. * The initials "TSUP" presumably are for Test Services Unit (Provisional), although they also could be for Test Support Unit (Provisional). 394