"The process is made difficult because of the need to balance national security with our deep commitment to assisting refugees and providing a safe refuge."

He asked whether the act, which balances privacy and national security, was "being administered properly," a question at the heart of the intelligence committee's work.

"Tragically, we live in a world where we have to balance security with people's rights to come and go," the mayor said.

Aviation experts emphasize that it is crucial to balance security with prudence and common sense.

But Congress, in its attempts to balance security with the public's right of access, has declined to impose further restrictions.

He said his department was trying to balance security with customer service and "not totally mess up the flow of passengers."

The administration had thought that it could balance politics, diplomacy and security by simply exploring the idea of a limited defense.

It's a fine line, balancing our freedom, security and privacy.

You have to balance efficiency and social security.

America should be able to reconcile its views on how to balance humanity and security with our nation's commitment to these same goals.