https://declassified.library.utoronto.ca/files/original/d8c1be7fb11b265b7cacf7ce9416d7db.pdf 0e9fb52f8ad08988c42f13027eccbd06 PDF Text Text Disarruamaiietit aierA^a^ptf^WJ^/^^rtnoff/o/i /let - Document divulgue en vertu de la Loi sur I'acces a I'informatio %• " - - *EXTERNAL AFFAIRS A AFFAIRES EXTERIEURES sccumrr CONFIDENTIAL 5° Mr. J . P . S c h i o l e r -yand Fiie^ «OM disarmament D i v i s i o n / D . M . C o r n e t t Sfcuritf DA7E Defence Research Board's Comments on our Letter of March 22 about Comprehensive Test Ban* ENCLOSURES Annex** DISTRIBUTION .. A p r i l I S , 1966* NUMBER Nutntro- fiEFERENCE Rifinnc. SUBJECT Su/ef , Fll^ OTTAWA J* A* M DOSSIER W'Y-1-l MISSION 3£l i\^r-~2»J>7- //' 7 Dr. Longair came to the office personally on April 15 to explain informally various difficulties in providing definite answers to the questions in our letter of March 22 about the military requirement for continued underground testing. On several points, particularly those touching on the development of an effective ABM system, we have no information or data based on Canadian experience^ we are, therefore, in the position of having to depend on information made available to us by the American authorities on this subject and of drawing inferences and deductions from such information and data provided by the USA from time to time in other connections* On the crucial question of the need for continued testing to develop an effective ABM system, the position, in brief is that Canada has no scientific or military data on which to dispute USA contentions* 2. Dr. Longair also gave us summary personal answers to the following questions in our letter of March 22: Page 2, Question ^3* The answer to this is yes, - significant advances in nuclear weapons technology could be made by ' single tests* Single tests, however, would never replace a series of tests since much more information would be available from a series. Page 3, Question #1. Dr. Longair*s opinion is that further testing is not neceasary to improve the USA strategic deterrent. With regard to an ABM system, the simple position is that we do not know whether further testing is necessary or not. Our scientists speculate that the remaining difficulties probably lie mainly in the areas of propulsion, guidance and discrimination and that tests to develop improved warheads are relatively less important. « « • 2 E*». 407A/W). (Admtn. Services Div.) 000042 �Document disclosed under the Access to Information Act Document divulgue en vertu de la Loi sur I'acces a I'information - 2 - Page 4, Question #2. The answer to this question is negative. page l+t Question #3* Dr. Longair considers that an. effective ABM system can be developed against a relatively simple and small-sized nuclear threat such as that likely to be posed by China in the decade following 1967* Dr. Longair*s opinion is that an effective ABM system against the nuclear threat posted by the USSR is unattainable* D.M. rnett 000043 � Text A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context CDBM00012 Title A name given to the resource Memo from Disarmament Date A point or period of time associated with an event in the lifecycle of the resource 4/18/1966 Source A related resource from which the described resource is derived RG25-A-3-c, file 27-11-7, "DEFENCE - CONVENTIONAL AND NUCLEAR ARMAMENTS - ANTI - BALLISTIC MISSILES (ABM) = DEFENSE - ARMEMENTS DE TYPE CLASSIQUE ET NUCLEAIRE - ENGINS ANTIMISSILES (ABM)," vol. 10357, part 1, Library and Archives Canada, (LAC). Creator An entity primarily responsible for making the resource External Affairs Rights Information about rights held in and over the resource Canadian Crown Subject The topic of the resource Anti-ballistic missiles Description An account of the resource Defence Research Board's Comments on our Letter of March 22 about CTB Publisher An entity responsible for making the resource available Canada Declassified Type The nature or genre of the resource Text Format The file format, physical medium, or dimensions of the resource PDF Language A language of the resource en