Castle Bravo
Castle Bravo was the first in a series of high-yield thermonuclear weapon design tests conducted by the United States at Bikini Atoll, Marshall Islands, as part of "Operation Castle". Detonated on March 1, 1954, the device was the most powerful nuclear device detonated by the United States and its first lithium deuteride fueled thermonuclear weapon. Castle Bravo's yield was 15 megatons of TNT, 2.5 times the predicted 6.0 megatons, due to unforeseen additional reactions involving Li, which led to the unexpected radioactive contamination of areas to the east of Bikini Atoll.
Castleshaw Roman Fort
Under the supervision of the University of Manchester, further excavation was undertaken on the site in 1957–61 and 1963–64. Between 1984 and 1988, Greater Manchester Archaeological Unit undertook excavations and restoration of the site. A group led by Professor Barri Jones – an expert on Roman Britain – was set up to co-ordinate the work. North West Water, then the owners of the site, ensured the area would not be used for agriculture. In an attempt to make the site accessible to the public, the outline of the fort and fortlet was marked out in low mounds and an education centre was set up nearby. The area beyond the fort was investigated for the first time in 1995–96; archaeologists were searching for a civilian settlement or "vicus" associated with the fort. Surveys revealed a settlement triangular in shape and to the south of the fort. The "vicus" is listed as a Scheduled Ancient Monument with the fort and fortlet.