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U.S.S.R.'s Big Ivan, e.g.
Answer for the clue "U.S.S.R.'s Big Ivan, e.g.", 5 letters:
hbomb
Alternative clues for the word hbomb
SALT concern
Frightful force
The first one went off in 1952
It was tested on Bikini, 1954
Thermonuclear blast maker
Weapon since 1952
Blast maker, informally
*Weapon first tested in '52
16-Across concern, briefly
Certain W.M.D.
Test ban subject, briefly
Big bang maker, informally
Eniwetok blaster, informally
Exploder at Eniwetok: 1952
Powerful weapon