, -3- uninhabited islands, and in the ocean beyond (l). No people were involved although plants and sea life and the detonation area exhibited radioactivity. Also, as more fully appreciated later, the radioactivity injected into the stratosphere would be subject to worldwide distribution. The Bravo Test , March 1, 1954 Bikini Atoll was selected for the next four tests beginning with the Bravo test of March 1, 1954. Four additional tests at Bikini followed by a sixth test on Eniwetok lagoon completed the “Castle” series of that year; these latter five were uneventful. Bravo, however, was the first test of a high-yield fission-fusion device designed to be in the multi-megaton range; also, it was expected to produce fallout similar to that of the thermonuclear test of 1952 and amp’le precautions were taken. The task force was careful to follow the standard injunction of detonating only when the meteorological conditions would ensure that the close-in fallout would be carried out over the uninhabited ocean. To reinforce that end, a precautionary no-entry zone was established for ships and aircraft extending about 335 miles east to west and 150 miles north to south around the Eniwetok-Bikini On March 1, 1954, the meteorological suitable to conduct the detonation. Atolls. conditions were judged to be The explosion attained an estimated 15 megatons and yielded unusual amounts of radionuclides and fission products adherent to or dissolved in the coralline rock melted up from the surface of the island. Much of this debris was injected into the stratosphere cloud topped out at about 100,000 feet. for the Some of the expected close-in fallout .