It altitude performance, such as the F-9L,0 or the F-89C, To be absolutely safe, the aircraft should carry no less than two men, Since six jet aircraft were needed this time Dr, Graves believed they should be assigned to the Special Weapons Command because of the necessity of modifying airplanes for sampling and the need for training crews. At the same time, he agreed with Colonel Fackler that control of sampling aircraft should be accomplished from an airborne control center and for this purpose, he suggested a p-sop, 46 Pursuing these views, Dr. Harold F, Plank, the Los Alamos cloud sampling expert, visited Colonel Clyde Box, Deputy Chief of Staff for Operations at the Special-Weapons Command, to discuss possible aircraft, Colonel Box recommended the F-9L1C aircraft since it carried two men, had an excellent altitude capacity, good range, and could use the wing filter tanks developed by the Los Alamos Scientific Laboratory.” Sometime in mid-Jamary 1952, therefore, Colonel Daniel E. Hooks, Chief of Staff of the Special Weapons Command, prevailed upon Air Force headquarters for F-9),C samplers, Two men were essential for sampling aircraft, he explained, one man to fly the aircraft and the other to monitor the radiological instruments. He pointed out the undesirable aspects of borrowing aircraft for each nuclear test series, modifying them, and training crews. Colonel Hooks wrote: The present plans call for from three to four continental tests per year which will involve the use. of the aircraft in actual cloud sampling missions for approximately one and one-half months during each test, or from four and one-half to six months per year, does not allow for any preparation time. This The essential training and refinement of new equipment and procedures will keep the aircraft fully employed between tests, 9 AFWLUHO SWEH-2-003), \,% a own.