IT the Los Alamos Scientific Laboratory and the Strategic Air Command, The controller followed the atomic cloud and directed the aircraft into it when the radiological director believed conditions were optimum, Through this method the sampler pilots could be told exactly what portion of the cloud to penetrate, The system worked very well and became a regular technique for future sampling. In all, the Operation TUMERER/SNAPPER sampling mission involved six aircraft: four T-33 jet samplers » one B-29 sampler, and one B-29 sampler control aircraft, In addition, there were crews which received on-the-job training. 7 Since the Air Force was scheduled to use F-8)G jet aircraft for collecting samples during Operation IVY, the Department of Defense required that sampling techniques with these aircraft be tested during this operation, The Air Force organization for IVY, Task Group 132.h, was being formed at Kirtland Air Force Base and, hence, their sampler aircraft and crews took part in the TUMELER/SNAPPER, Five F-8)G jet aircraft were sent to Kirtland by the Strategic Air Command 's 12th Fighter Wing, at Bergstrom Air Force Base » Texas, On 10 March 1952, the first group of 16 officers arrived to begin training for cloud sampling and terrain surveys under the direction of the 925th Test Group. Altogether, 27 jet pilots received training in radiological safety and fundamentals of cloud sampling, Later, during the shots, the F-8 pilots received experience in sampling clouds after the B-29 and TH33 aircraft completed their missions.”” 52 Ape SWEH-2-003), a\ wet we BA