8, All other development programs included in Table 1 of Part III of the December 31, 1956, Program Status Report were continuing in the development phase on March 31. A requirement was received in March from DOD for the development of a DELETED class B thermonuclear bomb included as TX-36Yo-X2 in Table 1 of the December report. This bomb will. not be gas boosted and the designation is changed to TX-36Yo-X1. TEST OPERATIONS fe» = 'S 3 oy ) 8 fo C9 oO ae 1 as formerly planned, in order to give the Test Man ct 9. The operational period began March 15 rathe +3 Operation PLUMBBOB ‘operational control at least fifteen days before the first safety test. 10. Twenty-two test shots, schedule, included in the following were planned for Operation PLUMBBOB, and continue through September 10. to bersin May 16 _ Ilir. James E, Reeves of the Albuquerque Operations Office was appointed Test Manager. DOE ARCHIVES Coerational safety criteria are basically the same as those for Operation TEAPOT held in 1955. to recuce the fallout hazard, Particular effort is being made A reduction in expected fallout is Me to be acconplisned by maximum utilization of palloons for shots (about ten) in lieu of towers, increase in tover height, and lowering of the maximum design yield. The totel clcese-in off- site fallout estimated for PLULSROB is less then for any rrevious 11, Feasibility tests of the balloon suspension system kave been successfully carried out at tne Nevada Test Site and these NA ae tests will continue until tne test serites begins in order thet operational techniques may be refined, -3-