TOP SECRET

The following intelligence organizations participated in the preparation of
 this estimate:

The Central Intelligence Agency and the intelligence organizations of the Departments
 of State and Defense, the AEC, and the NSA.

Concurring:

Vice Adm. Rufus Taylor, Deputy Director, Central Intelligence

Mr. Thomas L. Hughes, the Director of Intelligence and Research, Department
 of State

Lt. Gen. Joseph F. Carroll, the Director, Defense Intelligence Agency

Lt. Gen. Marshall S. Carter, the Director, National Security Agency

Dr. Charles H. Reichardt, for the Assistant General Manager, Atomic Energy Commission

Abstaining:

Mr. William O. Cregar, for the Assistant Director, Federal Bureau of Investigation,
 the subject being outside of his jurisdiction.

WARNING

This document contains information affecting the national security of the United
 States within the meaning of the espionage laws U.S. Code Title 18, Sections
 793, 794, and 798. The law prohibits its transmission or the revelation of its
 contents in any manner to an unauthorized person, as well as its use in any
 manner prejudicial to the safety or interest of the United States or for the
 benefit of any foreign government to the detriment of the United States. It is
 to be seen only by personnel especially indoctrinated and authorized to receive
 information in the designated control channels. Its security must be maintained
 in accordance with regulations pertaining to the and
 No action is to be taken on any
 which may be contained herein, regardless of the advantage
 to be gained, if such action might have the effect of revealing the existence and
 nature of the source, unless such action is first approved by the appropriate
 authority.

TOP SECRET

3.3(b)(1),
 6.2(c)
 GROUP 1
 Excluded from automatic
 downgrading and
 declassification
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