But there is a security gap that often isn't apparent on those college tours.

The Iraqi forces that were supposed to fill the security gap collapsed - or turned against us - at the first sign of trouble.

But the Government's latest attempt to seal the security gap is by far its most ambitious.

The "security gap" in national defense is not found to be as wide as it appeared last October.

It closes the security gap between a conflict that has ended and a functioning society.

Many people in private aviation businesses said they were scrambling to close security gaps.

The Colonel is not a man to publicize the security gaps in his forces.

It included an offer to fix security gaps in the computer system, and a request for money.

It was, in effect, filling a security gap for a larger operation that took place elsewhere.

But the company has not remedied the security gap.