ITR-1624(EX) EXTRACTED VERSION OPERATION HARDTACK—PROJECT 2.7 Nuclear Radiation from a Detonation at Very-High Altitude P. A. Caldwell P. Alers R. J. Drachman T. D. Hanscome U.S. Naval Research Washington, DC H. D. Holmgren C. A. Pearse J. R. Pennick R. C. Waddel Laboratory 18 July 1958 NOTICE: This is an extract of ITR-1624, Operation HARDTACK,Project 2.7. Approved for public release: distribution is unlimited. Extracted version prepared for Director DEFENSE NUCLEAR AGENCY Washington, DC 20305-1000 1 September 1985 BEST COPY AVAILABLE 410996