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Documents

August 24, 1955

Report by N.M Emanuel, 'Regarding the Nature of the Fallout Path of the Hydrogen Bomb Detonated on 1 March 1954 at Bikini [Atoll]'

Report by N.M. Emanuel on the U.S. Castle Bravo test in the Marshall Islands. The report surmises from fallout data that the bomb used a fission-fusion-fission design, and that the bomb contained a larger than normal amount of fissile material which induced a thermonuclear reaction.

February 28, 1955

Report by the Measurement Lab of the USSR Academy of Science, 'On the Properties of the Atomic Bombs Detonated on the Marshal Islands in 1954'

Soviet scientific intelligence report on U.S. nuclear weapons testing on the Marshall Islands in 1954. This report concludes that the Ivy Mike and Castle nuclear detonations were thermonuclear based on gamma ray spectroscopy of fission fragments collected by Soviet aircraft over the USSR and PRC.

May 16, 1956

Bhabha and Jawaharlal Nehru Correspondence on Indian Nuclear History

A series of letters between Dr. Bhabha and Prime Minister Jawaharlal Nehru covering a wide range of subjects, including the appropriate venues to voice opinions, the status of the Colaba site, meeting with the Pakistan Association for the Advancement of Science, and issues with coordination between the Ministry of Natural Resources and the Ministry of Education on scientific research and education. Also includes a copy of a letter from The Tokyo Shimbun requesting Dr. Bhabha’s presence at a forum discussing the justifiability of American hydrogen bomb tests in the Pacific.