11.   At the dawn of the Atomic Age, a Soviet spy ring that included Julius Rosenberg had stolen the first nuclear secrets out of Los Alamos.

12.   Because this analysis is based partly on inferences, there is still a debate within the U.S. intelligence community over which U.S. nuclear secrets the Chinese are using.

13.   Both sides in the case agree that the material Dr. Lee is accused of downloading contained nuclear secrets.

14.   A former scientist at the Los Alamos Nuclear Laboratory, Lee is awaiting trial on charges he shared US nuclear secrets with China.

15.   A trial for Lee raised too much risk that nuclear secrets would be pried loose by his defense attorneys during pretrial discovery.

16.   After he was fired, government investigators found that he had conducted unauthorized transfers of nuclear secrets from a classified computer system at Los Alamos into an unclassified network.

17.   Allegations that the United States lost its nuclear secrets to China in two decades of espionage were released Tuesday in a bipartisan House report.

18.   All of which leads to the question of whether Rotblat himself ever betrayed a nuclear secret.

19.   Bradley had not yet read the congressional report, but said safeguards to protect nuclear secrets should be improved and that those involved should be punished swiftly.

20.   Bush also criticized the Clinton administration in May for taking inadequate action after accusations arose that the Chinese were stealing U.S. nuclear secrets.