91.   It also outlines the insidious security dangers arising from international crime, terrorism, and trafficking in drugs and nuclear material.

92.   It can only try to insure that nuclear material for peaceful uses is not diverted for weapons.

93.   It is still spending hundreds of millions of dollars to help safeguard nuclear materials.

94.   It is unclear whether a gas centrifuge, which can speed up the enrichment of nuclear material to weapons-grade quality, is part of the contract.

95.   It is far less likely that terrorists could fashion a nuclear weapon using stolen weapon-grade nuclear material, the agency said.

96.   It allows small tests in which nuclear materials are thrown together as long as the experiments have an energy output equal to zero.

97.   It was an element in the risk analyses of Western security policy makers long before any illegal trading in nuclear materials was ever detected.

98.   It was this excess of uranium that triggered a chain reaction involving the fission of deadly nuclear materials.

99.   It was shipped overseas to encourage peaceful use of nuclear material, for research and production of material used in cancer treatment.

100.   Lab officials blamed an accounting error and said there was no actual disappearance of nuclear material.