Japanese scholars have attached great importance on the study of the Use of Spies in Sun Tzu's the Art of War.

日本的《孙子兵法》研究学者对《用间篇》格外重视，而且很有研究心得。

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That said, police officers and spies use a slew of interrogation tricks that the rest of us can adopt to improve our detection odds.

FORBES: Magazine Article

America's spies still need to intercept telephone calls, use satellites to photograph the armies of rogue states, and run undercover agents.

ECONOMIST: The world's most thankless job