We have a very small staff here, and there are security concerns.

He asked that his name not be used, because of security concerns.

And given security concerns, that isn't likely to change soon.

That judge said the court could not act because of national security concerns.

There will be time for security concerns and politics later.

In all these cases, national security concerns were fully considered.

There is significant debate within Israel about how to deal with the country's security concerns.

"But at what point is national security concern so great that a person can't get a fair trial?"

Dependence on foreign oil is an important national security concern.

At this point, I don't see that it's much more than a security concern.