Castle Bravo
The decision to carry out the Bravo test under the prevailing winds was made by Dr. Alvin C. Graves, the Scientific Director of Operation Castle. Graves had total authority over detonating the weapon, above that of the military commander of Operation Castle. Graves appears in the widely available film of the earlier 1952 test "Ivy Mike", which examines the last-minute fallout decisions. The narrator, the western actor Reed Hadley, is filmed aboard the control ship in that film, showing the final conference. Hadley points out that 20,000 people live in the potential area of the fallout. He asks the control panel scientist if the test can be aborted and is told "yes", but it would ruin all their preparations in setting up timed measuring instruments. In Mike, the fallout correctly landed north of the inhabited area but, in the 1954 Bravo test, there was a large amount of wind shear, and the wind that was blowing north the day before the test steadily veered towards the east.
Ebeye Island
Some of the residents of Ebeye are refugees or descendants of refugees from the effects of the 15- Castle Bravo nuclear test at Bikini Atoll on 1 March 1954. The detonation unexpectedly rained nuclear fallout and two inches (50 mm) of radioactive snow on nearby Rongelap Atoll, which had not been evacuated as had Bikini. The 1954 American authorities then evacuated Rongelap and were returned in 1957 with extensive medical surveillance. In 1985, Greenpeace evacuated the inhabitants of Rongelap to Mejato (island in Kwajalein atoll). Ebeye was the final destination for many of them.