INSTRUMSNTATION OF OPERATION CASTLE ae Orgenization and Personnel fund] 1953 = Moy 1953: During this pericd the scetion was cn TDY to Indien Springs, Nevola, for project "Upshet Knothole." Test Group (Atomic) was its perent organizetion. The 4925th The section was coi posed of two officers, lst Lt Russol W Bollinger and 2nd Lt Richard S Nunbers, and five airnen, S Sgt Clifford E. Welsh, t/1C Janes P Hote, if/1C frlynd D Myres, A/2C Robert T Barton, and 4/20 Wallace S Brewn. These iionths were spent in support of 'Upshot Knothele! and rcll-up activitics subsequent to it. Junc_1953 — Auzust 1953: | Ubon the section's return te Kirtland AFB, airmen ani officers returned tc various secticns of the 4925th. The airsicn fermed the Raticlovicel Section of the Leboratcry Branch, - 4925th Test Group, and Lts Bollinger and Numbers roccivo: PCS assign- <a ments. On 10 June 1953, 1st Lt Walfred J Larson was assigned te the 4926th Test Squadren (Sampling) as Instruncntation Officer. During the fcllowing months, much planning was cone t: support the oncraticon that was planned for the Pacific Proving Grounds luring the spriug of 1954. It was determined that at least five skille’ clectrenics nen were required to perf-rm the secticn's missicn, These men wore to ve wilior with radiae instruments and have a sood genercl kucwletye of radiation preblems, The requirements for this section os stated by De. Harcld Plank, LASL, was tc “include at least two, and pvcfersbly teres, ef theion that wore in the secticn Juriny; Upshet Knethels." Although five nen sc qualificl wore assigned to the 4925th Test Gremp the 4926th's parent organizeticn, nene of thoil wore over assizne? te the 4926th Tost 32 “