TAR A ZUNT EVENT OPERATION REDAING teThe atomic defice, ZUNI, was fired at O656M, 20 Mey 1956. The slot2 ot Mosation ion was was atat thethe surf surface onnm the the western we tip tip o of Eh INMAN Island tand ‘TARE: of BININIT Atoll. The cloud reached an estimated 60,000 feet. CLouc penesration end sampler aircraft reports et H+*30 minutes indicated m “hat che gereral cloud movement was te the North at 15 knots. Ths lower ervion of the stem moved at epnroximately I5 knots -to the West. it H+3“hours P2V reconnaissance aircraft intercepted the lower cloud - -O rilies West of BIKINI at 12,C00 ?eet, Cloud penetration aircraft mace several penetrations of the visible cloud during ww etty tne pericd of Ht30 mimbes: Charenzh #13 bhhours with moderate intensities encountered (60 ~ 100r). 2. -The fallout forecast (TAB B) for ZUNI was based on a surface “urst of S-mezaton yield. 3. Fisgion n yield was assuned to be_on tke orda> of ZEBRA I reported baexgrounc. intensities at H+l hour 2% a position Jive ‘wiles South of ENYU (MAN), Eased on this report ZEBRA I wes inst-ucted o mace a low altitude survey of ENYU and the enchorege, porved the NAN air strip and the enchorage-"elean". At H+13$ hours ZEBRA I The initial helicopter