?. , .? ● Tn the accomplishment of thismission,a comprehensive Dositive intelligence plan providingfor the world-widecollectionof intelligence informationconcerningthe activitiesof unfriendlypowersas relatedto Opration Sandstonewas deemeda prime requirement.Ivouldpenetration of our securityscreenby submarine,surfacevesselsor aircraftbe attempted? Would conventional methodsof espionageand sabotagebe employed? The establishment of charnelsdesignedto tap all intelligence resourcesof the governmentwas thereforeundertakenin orderto procure informationthatwould assistthe J-2 staff in keepingthe Ccmumnderof the Joint Task Forceappropriatelyinformed. Of not lesserimportancewas the preparationof a comprehensive counterintelligence plan (embracingall elementsof physical,personnel and informationsecuritycontrol)designedto screenthe operationfrom hostilepenetrationor infiltrationby forcesintenton espionage,sabotage or the outrightseizu~ of fissionablematefialand its related equipment. The preparationof theseplans receivedthe early consideration of the JointProof Test Committee,whose recommendations relativeto the overallmissionof the Task Force and its initialorganization were approved by the JointChiefsof Staff on 18 October1947. For example,certainof the specificJ-2 objectivesassignedthereinwere as follows: a. ‘~. . . . . . . . . .Implementa detailedprogramto insure appropriatesecuri~ clearanceof ‘@rsonnelassignedor attachedto the t 2 SectionII .. ‘* ., - b