This document consists of Copy No. Ae 42 of 13 @2 pages Series_C__ UNITED STATES ATOMIC ENERGY COMMISSION WASHINGTON, D. C. November 8, 1950 MEMORANDUM FOR The Military Liaison Committee SUBJECT: | REVISIONS IN GREENHOUSE PROGRAM The Director, Los Alamos Scientific Laboratory has recently submitted for approval, the proposed 1951 laboratory program. There are several items in the program which affect GREENHOUSE, These include the requirement for a fourth - and possibly a fifthshot, the development and test of airborne instrumentation for measuring yield, alpha and transit time and provision of air drop ~°* capabilities for use for the fourth shot. a There is available, at Eniwetok, a fourth tower which can. be erected on the same site as the first shot. Provided the dew velopment and test of the airborne instrumentation proves it. a satisfactory we would prefer to use an air drop for the fourth., ... shot, thus preserving the extra tower for the possibility of the fifth shot if it should be needed. : In any event, the test and calibration of the new airborne instrumentation is considered essential to our progress towards the ultimate use of air drops to facilitate and expedite future test operations. Accordingly, the Atomic Energy Commission requests that action be initiated at once to provide the capability for both the air testing of the equipment in question and an air drop for one of the experimental shots at Operation GREENHOUSE, Preliminary discussion and planning indicate that equipment and trained personnel can be furnished for this purpose with a minimum of cost, delay and possible conflict with other programs. It is understood that approval of, and action on, this added responsibility will be subject to resources available, or to be made available, to Joint Task Force Three. The Commander, Joint Task Force Three, has informally indicated his understanding of our need and his willingness to incoporate those tasks into Operation GREENHOUSE. FRin Hate on ¢ OF I@54. SECRIEFtn Adentn' palghact weUORS, YO YPIB AGoF ”