11.   Prosecutors say the former officer, Alexander Nikitin, harmed national security by reporting on Russian submarine accidents and the potential for nuclear contamination.

12.   Several committee members, however, appeared skeptical that U.S. national security would be harmed by unfreezing the assets of terrorist countries.

13.   These groups argue that not only does the law discriminate against immigrants, but it will also harm security at airports by forcing out experienced screeners.

14.   This legal caution can create a dilemma in which no one is charged with a crime, yet national security may be harmed because no one does a search.

15.   We will harm our security if we fail to appreciate the great differences among them.

16.   Organizations that want to set up networks must not do anything that would harm state security or reveal state secrets, the report said.

17.   Politicians from the Socialist opposition have warned that the files can be misused and even harm national security.

18.   A special U.S. House committee unanimously concluded that technology deals with China over the past two decades have harmed national security.

19.   A U.S.-based scholar detained for nearly six weeks in China is accused of harming national security, the Foreign Ministry said Thursday.

20.   Current law makes it a felony to harm national security by leaking classified defense material.