direct access to the Task Group Commander from the various task units. Because of the formation of a fifth task group certain other organizational changes were planned and went into effect when Task Group 7.5 was established. The Test Facilities Task Unit, with an altered mission, became the Staff J-6 Division. The Staff J-2 Div- ision was eliminated and the reduced but necessary functions remaining were transferred to the new J-1 Division position of Sec-. urity Liaison Officer. Likewise, it was possible to eliminate en- tirely the Base Facilities Task Unit from the Scientific Task Group organization. Also new to Scientific Task Group organization was the inclusion in the task group of personnel from UCRL. Integration of UCRL interests into Task Group 7.1 was accomplished with the view in mind that subsequent to CASTLE, UCRL would be in a position to conduct overseas operations independently of LASL. For CASTLE, UCRL was scheduled to have responsibility for the design, fabrication, and assembly of two devices and for certain diagnostic experiments associated with these shots as well as other diagnostic experiments connected with LASL shots. The only other significant organizational change was in the manner in which the scientific programs were to be administered. In IVY, all scientific programs had fallen into and under the control of one task unit. For Operation CASTLE, LASL, UCRL, and DOD scientific programs were given separate status and became the responsibility of Task Units 1, 12, and 13 respectively. 50