LACROSSE EVENT OPERATION REDWING Ll, ° The etomic device.! LACROSSE, J wes cetoneted at 06750, 3 5 Mey 1956 at the surface on the island of RUKIT in the ENIWETON Atoll. LC,C00 feet. . The LACRCSSE cloud reached an altitude of appromunately Ppro : The cloud sheared et approximately 16,000 feet with| the stem and lower portion of the cloud moving the unver sorticr moving 6 west, 5 Se ~ the Northeast. to The initial helicopter survey indicated thet the falleutwas developing as forecast. Based on the initial nelicepter survey anc aerial monitoring reports, reentry hour wes esteblished as O7LSE; 5 Mey 1956. 411 RADEX notices were withdrawn at 131CM, 5 Nay 1956 and the EXIWETOX area was open tc aircraft. eo The fallout predicvion for LACROSSE «ras based or. 2 surface burst with a maximum yield on the order of 60 Kilotons. The fallout plot (see TAB B). shows the fallout with long axes lying along a Cc n rue bearing of 50°. The rether limited 2 information on fallout for LACROSSE prevents 2 cquantiteative tomparison fo “ul of the agtuel end forec