Because of the late closing date of Hardtack and the impending opera- tion. at the Nevada Test Site, it was necessary to return an unusually large amountof electronic gear by air for TU-2 and TU-5. Approximately 143 tons of cargo was shipped by air from Eniwetok to the ZI during the last half of August and early September. The IBM 704 computer was shut down August 6, 1958 and returned to the ZI on two SAM C-124's on August 14, 1958. Newareel Roll-up -- Because of the uncertainty of whether there would be a third shot in this phase of the operation, roll-up got under way slowly. When it was determined that the second shot was the last, it progressed rapidly and smoothly. Air shipment of 56 tons of cargo and water lift on three ships, as listed below, completed the movement of retrograde cargo from Johnston Island to the ZI via Pearl Harbor. August 19, LSD Belle Grove August 24, LSD Monticello August 26, LST 618 1820 M/T 2964 M/T 1624 M/T Manifests were flown to the Task Group 7.1, J-4 Liaison Officer at Hickam, and he in turn prebooked this cargo for movement to the ZI on available MSTS or commercial vessels. Arrangements were made for Task Group 7.2 to have an ordnance team at Johnston for receipt of Task Group 7.1 vehicles and to process them there for return to the appropriate ordnance depot. J-4 provided the normal roll-up services of furnishing packing material from stock, carpenters, and labor, and either documented or assisted in documenting cargo. Headquarters Roll-up. Forty-five boxes of classified records of the Task Group were returned to home stations by air on August 15, 1958. The Forward Area Headquarters of TG 7.1 closed as of 2400 hr, August 29, 1958 (Eniwetok time and date). All AEC and DOD equipment was shipped to the appropriate locations in the United States. Furniture and other office equipment on loan from Holmes and Narver and TG 7.2 were returned to their warehouses or left in place. 3.19 CONCLUSIONS AND RECOMMENDATIONS General. Sites and Scheduling - The separation of weapon laboratory activities into two sites as well as establishment of multiple capabilities at each site proved to be one of the primary means by which the operation was accomplished on a reasonable time scale. It is recommended that future operations follow the same pattern, although substitution of Taongi for Bikini could prove to be extremely advantageous due to the more favorable weather situation at Taongi. The development of techniques for conducting open sea firings for limited diagnostic proof tests should also be vigorously pursued because of their many operational advantages. It appears that it would be advantageous to separate weapon development tests from effects tests in time and/or location. In general, effects tests require a great deal more support, have many more operational limitations, and interpose schedule interferences with development tests. Organization — The fact that Hardtack, which was larger than all of the 113