10 2.1 Bravo The test initial thermonuclear device -- event device was 1000 It had been blown to 2.1 the at Rongelap as to east suggest snowing to (Sharp in the of that that at and during Rongelapese, & Chapman, powdery, 1, Bikini as the 1954, Atoll, bombs 25 miles when above the that the a 17-megaton-yield Bravo test. destroyed earth, The Nagasaki and after 10 70 miles. the about the finely it been by the military. for would 7 hours never Rather seen than fallout, clothing. blown reason after ensuing or be whatever 5 hours granular from food separate “cloud�� who had 1957). was made to issued at Unexpectedly so Atoll, off rose planned #l). on March powerful cloud a diameter (Fig. played its as had north occurred was set times and Hiroshima; minutes 1954 to (Note detonation fell snow, avoiding in that the west 3), it fallout such it contact, and was began quantities was children and no particular effort No warning had was or