Their work constitutes the most publicly well-known and well-documented case of nuclear espionage in the history of nuclear weapons.

China has denied that it engaged in nuclear espionage.

But midway into its inquiry the committee turned to the reports of nuclear espionage.

Julius and Ethel Rosenberg were executed for nuclear espionage in 1953.

A congressional report accused China of nuclear espionage .

Mr. Clinton stated last month that he had never been told about evidence of Chinese nuclear espionage during his Presidency.

Better coordination is needed among the various intelligence and law enforcement agencies in detecting, investigating and prosecuting nuclear espionage.

Charles suggests it's a government job, and Gia gets excited about nuclear espionage.

The Clinton administration, they said, is soft on Chinese nuclear espionage.

Now, as then, we have become aware of nuclear espionage that appears to have severely damaged our national security.