Answer: ATOMICBOMB

AnswerCrossword Clue
ATOMICBOMBPhrase coined by H.G. Wells in 1914
ATOMICBOMBWWII weapon
ATOMICBOMBFat Man, e.g.
ATOMICBOMBSubject of front page pictures.
ATOMICBOMBDestructive agent.
ATOMICBOMBEarthshaker of 1945
ATOMICBOMBLittle Boy, e.g.
ATOMICBOMBTest ban topic