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Historians: Soviets Stole H-Bomb Secret From U.S.

A defining moment of the cold war came in 1955 when Moscow detonated its first hydrogen bomb — a weapon roughly a thousand times more powerful than atom bombs and ideal for obliterating large cities.

The bomb ended the American monopoly and posed a lethal danger. So Washington dealt far more gingerly with Moscow, beginning a tense era dominated by fear of mutual annihilation.

Now, a new book says Moscow acquired the secret of the hydrogen bomb not from its own scientists but from an atomic spy at the Los Alamos weapons lab in New Mexico. Historians call its case sketchy but worthy of investigation, saying the book, “The Nuclear Express: A Political History of the Bomb and its Proliferation,” by Thomas C. Reed and Danny B. Stillman, adds to a growing number of riddles about who invented the Soviet H-bomb a half century ago.

“It’s quite intriguing,” Robert S. Norris, a nuclear historian, said of the book. “We’ve learned a lot about atomic spies. Now, we find out that a spy may be at the center of the H-bomb story, too.”
Read entire article at NYT