The lack of public school music has become a national concern.

What recent event has made that a matter of national concern and why?

It is and should remain a national concern for a long time to come.

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

"But here, we're making effective education a national concern and that we've got to get the focus back on learning."

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

What was a local dispute soon became a national concern.

"It must be clear to all right now that violence is a national concern," he said.

"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.