Ellsworth AFB, South Dakota. 77tn Strategic Reconnaissance Squadron. Unidentified Unit. Ten men. The 77th Strategic Reconnaissance Squadron the 28th Strategic Reconnaissance Wing sonnel orders (SO#1l) Fifteen men. (SRS) was subordinate to (SRW) at Ellsworth AFB. Per- issued by the 28th SRW on 4 January 1954 at Ells- worth AFB named 18 men from the 77th SRS, 5 men from the 28th Armament and Electrical Maintenance Squadron, 5 men from the 28th Field Main-~ tenance Squadron, and 2 men from the 28th Periodic Maintenance Squadron for duty as CASTLE participants. The 77th SRW flew an RB-36 air- craft for sampler control and documentary photography missions, while the other squadrons maintained the aircraft. These units were part of the TAU. Enewetak (APO 187). 4930th Test Support Group. Twenty-nine men. 493lst Test Support Squadron. Forty-one men. 4932nd Test Support Squadron. Ninety-eight men. 50th Air Transport Squadron. One man. 1500th Air Transport Squadron. 1500~3 Air Base Wing. Unidentified Unit. Eleven men. Four men. Thirty men. APO 187, Enewetak, was the home station given by the units listed above. The first three are identical to the elements of TG 7.4 Test Support Unit (TSuU) that operated the Enewetak airfield, providing Enewetak and Enewetak-Bikini airlift for the task force. The 4930th Group was the headquarters element of the 493lst Squadron, which oper- ated the aircraft, and the 4932nd Squadron, which operated the airfield service. The 493lst Squadron shows more exposures in the higher ranges, undoubtedly due to flight operations in contaminated areas. The 50th and 1500th Air Transport Squadrons were involved with the logistic flights into the PPG and the personnel exposures are not remarkable. The 1500-3 Air Base Wing was also involved in air transport, 393