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t ie 5 re) 9 1 Sf j. CLASSIF ION FER OGA LETTER. PTIONAL FORM NO. 10 010— ee p ‘ J Bin yea EDITION” SO“ TED 4-208 t . ~ “ -~ "GSA GEN, REG, NO. 27 » UNITED STATES GOVERNMENT E:; 04-02-2008 we cice es «CLASSIFIED BY 60324 uc bew/stgso§ ——— Memorandum = 8s SISTA essa om Conrad 4-02-2035 Felt —__f__. . ° Gale —_,. f= . Suey we Pores he : Mr. W. C. Sullivan La Rosen Ags Tavel Trotler Tele. Room Holmes Gandy SUBJECT: UNITED STATES INTELLIGENCE BOARD CUSIB) a \ fis SPECIAL NATIONAL INTELLIGENCE ESTIMATE (SNIE) hy Vy) tm SECURITY CONDITIONS IN MEXICO (SNIE 81-66) a ( 2 Ns, hy~ shew B,° Joinsow yy MW) Memorandum [____] to Sullivan dated 4/7/66, [EERE the Bureau's representative on USIB concur in the estimate entitled Security Conditions in Mexico. er mh (Copy attached )—-chithehd Yuh 4. 620 PHD, Gy xbussty_dn fog yay whe badaS vb butane Wes: -- , The most Significant conclusion of the attached ‘ estimate is that while there can be no absolute oan wy ‘f jagainst incidents’ designed to disrupt U. 5. - Mexican relations from occurring, USIB believes that the pextean ‘Government will take security precautions which Nak. C adequate to protect Mrs. Johnson and Secretary Rusk. (Shy r ar ms <The USIB Secretariat advised on the afternoon Do of 4/12/66, that Admiral Raborn has asked that the attached )” estimate be reviewed and that a memorandum to holders of the estimate be written updating the estimate, | ;The memorandum ‘to hoiders, attached, states as follows: ' ve reviewed SNIE 81-66 Security Conditions in Mexico, and we believe that its findings are still valid. Subsequent information indicates that the Mexican Government is taking security || Sse to minimize the chances of an untoward incident u The memorandum to holders has been reviewed by - ee | the Domestic Intelligence 1 kttach of information we have received from Legal Attach in Mewicee As a ‘eesult of this review, we believe we can cones memorandum to holders of SNIE 81-66, /() 4 — BEE BYR MU ao Loe TION: If approved, the Bureau's rommegantataxe 0 Pon USIB itl concur_in this memorandum to holders cl efe 4 4st APR 34 wa. | & SB me Gee gb b7c (2),, 1 =, ye betoace Sullivan