The President
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One other test of the original program has been deferred to the
underground test series of very low-yield devices planned for the
fall 1958 at the Nevada Test Site which I deseribed in my November
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23 letter, and which will be conducted as a separate test series to
be known as Operation MILGLRACE.
‘In summary, the overall change to the HARDTACK program has been an
increase of three scheduled shots, making a total of 20 scheduled
Laboratory and 5 scheduled DOD effects shots. In addition, there
will be two contingent shots whose firing depends on the outcome of
‘other shots in the series. Attached to this letter is a summarization
of the scheduled and contingent nuclear shots in the HARDTACK. and
MILLRACE programs and their objectives. Calculations on the basis of
this revised program, including latest laboratory estimates of the .
specific yields of the various shots, reveal that its contribution
to world wide fallout is essentially the same as that of the program
presented to you in ny letter of November “31957.
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“For all shots in Operations HARDTACK and MILLRACE, and the safety
tests mentioned above, it will be necessary to expend up to the
following amounts of specialnuclear.materials: ---J 4
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We request! your approval of the expenditureof the materials listed
above.
Respectfully yours,
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Attachment:
A
HARDTACK Test Program
.
The President
The White House
:
pproved in part as stated
in Endorsement attached,
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January 31, 1958
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