pl.anwas followed throughout tain~ the operation. The diffi~ties of ob- secufitY clearances for the photographicpersonnel pnlonged the pretiaw period and caused considerablehardship to some photo- graphic personnel, however, the job was done, and well done, and the hardshipsWm be foxgotten in the satisfactionof a difficult job excellentlyexecuted. The original conception that all photography in thefima area should be under one control, was, and remahs, the sound and defensible idea. The intmsion of various scientificgroups into the forward area at the last minute, each with a certain amount of photographicimpedimenta,which, through the lateness of its arrival, caused modifications of the basic plan, should in no way detract from the soundnessof the original concept. 17. Real progress is thwarted by the tendency to assume that correct equipment and techniques have been used if the results are satisfactory. This, because the photographic towers served their purpose, it might be arguedthatthey were satisfactory,but it is stated emphaticallythey were not. Poor things were made to work by olever individualsworking very hard. 18. a. The following recormaendations have been determined as result of experience gained on Operations Crossroads amd Sandstone. “ There has beenno attempt to expand these in the body of the report as it is felt that their merits are self-evident. (1) It is recoxnended that planning be initiated at once for the next series of tests and that equipmentbe simpler U SectionXVIII

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