2TPROOUCED AT THE NATIONAL ARCHIVES ~ . : / . T ADMINISTRATIVE MARKEEG E.0. 12068, Section e524 By)... MARS, Date Vite... This document consists of - ve No. 4 of _£.- Copies, Si Z should like to emphasise that during operation SANDETONS no single individual of Joint Task Force 7 sustained an injury as a direct result of the testes Thin of course includes radiological casvaltics. The major pertion of the Joint Task Foree sailed from Pearl Harbor oa 8 Maren in ships of the Navel Task Group. Mlagehip cf the force vas the command ship USS Mount NcKinley, veteran of the Pacific war and of t Bikind atoalc tests, The four shige of the convey had eboard the prine cipal participants, beth selentific and silitary. Construction of the proving greund had been commenced in late December 1947 by General Ogdsn! arey units, in secerdance with plans develeped in coardisation with the Scieatifie Grou. contract. Some of our construction was performed hy civilian The Morrison Kauieen-Peter Kiewit Companies, the Ayrnes Coapar ant the Hawailen Dredging Gompany were three civilian agencies engaged at different tines on the project. One of the mest extenoive construstion projects was that of signal communioatie&® Both radio and telephone service was required. Mesriy 21,000,000 feet of eudmarine cable was laid under the direction of the U. B. Const Quard. Inchdentally, it sight interest you to know that within the Tack Force in addition te the Scientific personnel fron the AXC's Los Alanan Scientifia Laboratory at New Nexice, and many other parte of the country, we had engaged at different periods during the preparation for and conduct of the tests personnel from the Arny, Navy, including Marines, Air Poros, Comat Guard, Public Health Service, Coast and Geodetic Survey civilian employees from the different Services and oivilians working SEetaa