"CIA, Pakistan Locked in Aggressive Spy Battles"

"WASHINGTON -- A Pakistani man approached CIA officers in Islamabad last year, offering to give up secrets of his country's closely guarded nuclear program. To prove he was a trustworthy source, he claimed he had spent nuclear fuel rods.

But the CIA had its doubts. Before long, the suspicious officers had concluded that Pakistan's spy agency, the Inter-Services Intelligence, was trying to run a double agent against the them."

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