SECRET * ARDC General Order No. 2, published on 6 January 1953, designated the provisional unit, Headquarters, Task Group 132.4, Provisional (CASTLE), and assigned it to Headquarters, AFSWC, effective ] January 1953. The mission of the unit was "...to provide command and adminis trative control of personnel attached in connection with the activities of Joint Taak Force 132." The latter general order also discontinued a table of distribution unit, that of the 4930th Test Support Group, and redesignated it to the Forward Area (Eniwetok Atoll). During IVY the 4930th had been the parent organization at Kirtland Air Force Base of Task Group 132.4 for the purpose of administration and agsignment of peragonnel., It was what is commonly known as a "paper organization," When the 4930th was organized at Eniwetok, the 493lst and 4932nd Test Support Squadrons were organized and placed wder.its jurisdiction, The Office of the Deputy Commander for Overseas Tests had been organized and established within AFSWC in October of 1952 as a planning section when Deputy Chief of Staff for Operations (DCS/Operations), USAF, notified ARDC that CASTLE was to be conducted in the Pacific Proving Ground as soon as conditions permitted. Colonel Edward M. Gavin assumed the position of Deputy Commander for Overseas Tests and Lt Colonel Richard S. Nugent was named as administrative coordinator .° Colonel Gavin's office worked closely with AFSWC Operations person nel during the interim between IVY and CASTLE, One of Colonel Gavin's major projects was to make studies on the availability of aircraft in order to meet the requirements for extreme high altitude nuclear cloud sampling. The altitude requirements for these sampling aircraft were to be upwards of 55,000 feet, and the availability and capability of then- B EST AVAI current aircraft posed difficult problems. LABLE Co py