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a. Mr. Libby said he believed it was necessary
to be cautious about releasing information on
vhermonuclear weapons because of the need to
protect certain principles used by the U.S. in these
weapons.
He referred to the Commission's decision not
to join with the DOD in determing that thermonuclear
weapons information could be transmitted to the U.K.
b. Mr. Vance said he believed that eventually the
information would have to be provided cne U.K,
Secause of the DOD desire to be able to integrate
U.S., U.K. and Canadian military forces in the evant
of war, He pointed out that the MLC had indicated
that the DOD would seek legislation to do so.
c. Mr. Fields said that from intelligence information
on the latest Soviet tests, it appeared that they were
already using certain of the principles the Commission
regarded as being highly sensitive.
He observed that
after Operation CASTLE, certain information on the
U.S. developments had probably been compromised through
the cancellation research
on means of using deuteriun.