Operations: Sampling devices on F-84, WB-29, and B~-36 airdraft were used to obtain nuclear debris samples close in to the detomations. Long-range calibration samples were also collected by WB-29 aircraft. Aircraft generally did not enter the cloud until 2 hours affter burst; the clouds were followed for 5 to 7 hours while samples we obtained. Collection of close-in particulate samples was being Under the technical direction of LASL, gas sample collection was supa@rvised by Hq USAF, and gas separation and some analysis was performed by UCRL. Shots: All. Radiation Exposure Potential: Exposure potential existed fibr aircraft crews, as well as for those processing samples upon the airpraft's return and those decontaminating the aircraft. Staffing: Five people were definitely associated with this] project, three from the 1009th (two civilians, one military), one cipilian from LASL, and one civilian from UCRL. Table 19. Their exposures are presPnted in Exposures for personnel from other task groups, flotably TG 7.4, are given in Table 87. Project Report: Reference 77. Cloud Photography (Program 9) A single project, Project 9.1, made up this program in ordef to determine the rise rate of the cloud and the height at which the clofs ceased to rise. Project 9.1 -=- Cloud Photography Agencies: Edgerton, Germeshausen & Grier, Inc. Lookout Mountain Laboratory (LML) (EG&G) 1090th USAF Special Reporting Group Operations: Technical aerial photography was conducted by , with backup ground photography by EG&G in conjunction with its pllotography work for LASL. One RB-36 and three C-54 aircraft, each equipped with two cameras, flew one mission per aircraft for all six shotg. flights were 40 to 100 nmi (74 to 185 km) 199 from ground zero. The