meP In general the requirements submitted during the planning phase were approved by JTF 132 and during the operations phase this Task Group received excellent cooperation and support from the Army, Navy, and Air Foree Task Groups in providing these requirements. III. A. ~ PLANNING AND TRAINING Device Planning One of the major purposes of Operation GREENHOUSE was to answer key questions relating to the possibility of developing thermonuclear explosions. George and Item Shots were important steps in the investigation of basic problems in the development of the thermonuclear device. By August 1951, the Chairman of the United States Atomic Energy Commission had stated in a letter that a thermonuclear bad device would probably not be ready for testing prior to the Winter of 1952-53. However, in late October 1951, he reported that progress in research and development activities had been such that a more realistic date for planning purposes appeared to be-the Fall of 1952, possibly 1 October. In addition to the thermonuclear device to be tested on Operation IVY, the Director of the Los Alamos Scientific Laboratory instructed J-Division (Test Division) to plan for an air drop of a high-yield (500 KT) fission weapon as a second IVY event. Nit mage egiters voo all on “get h a= 7, ’ ~h-