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on CASTLE (pp. 2-21)
Mr, Nichols prefaced General Fields’ briefing of the
| nee
‘Commission by saying that it was a preview of the briefing by
8
General Fieids of selected members of the Planning Boaré later
shat day.
After referring briefly to the development of fission
weapons and the present fission weapon family in stockpile,
General Fields commented on the successful detonation of the
first thermonuclear device during IVY in November
1952, and the
resulting acceleration of the thermonuclear production program,
a
Ye then reviewed the CASTLE series of tests and the results
"
a
which they achieved,
t FarnerHERMESMao Sheer yerney
There followed a description of expected destructive effects
eT
of these weapons including an estimate of fall-out results from
ro
a 15 megaton weapon detonated at zero point in Washington, D, C.,;
based on partially evaluated fall-out results of the first CASTIZ
shot,
General Fields also commented on the implications of the
development of thermonuclear weapons with respect to air defense
and intercontinental missiles and ended the briefing by presenting
® comparison of relative costs of TNT and thermonuclear weapons,
DECLAGSTERTED
B.O, 18968, Sac. 3.6
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