In a new book, two British investigative journalists dig into the story of Pakistan's clandestine nuclear network — and America's role not just in condoning its ally's nuclear ambitions, but aiding them.

Adrian Levy and Catherine Scott-Clark are senior correspondents for the Guardian newspaper; both previously worked for the Sunday Times of London.

Their book is titled Deception: Pakistan, the United States, and the Secret Trade in Nuclear Weapons.

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